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1280980020960 = 25365233173211
BaseRepresentation
bin10010101001000000010…
…110111110111011100000
311112110102200220102000000
4102221000112332323200
5131441421341132320
62420250223300000
7161355610344423
oct22510026767340
94473380812000
101280980020960
11454295910452
1218831974a600
1393a46782c83
1445ddd4cd9ba
15234c4240c90
hex12a405beee0

1280980020960 has 1344 divisors, whose sum is σ = 4977838043136. Its totient is φ = 310393036800.

The previous prime is 1280980020959. The next prime is 1280980020989. The reversal of 1280980020960 is 690200890821.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 6070995255 + ... + 6070995465.

It is an arithmetic number, because the mean of its divisors is an integer number (3703748544).

Almost surely, 21280980020960 is an apocalyptic number.

1280980020960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280980020960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2488919021568).

1280980020960 is an abundant number, since it is smaller than the sum of its proper divisors (3696858022176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280980020960 is a wasteful number, since it uses less digits than its factorization.

1280980020960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 1280980020960 in words is "one trillion, two hundred eighty billion, nine hundred eighty million, twenty thousand, nine hundred sixty".