1231334657280 has 864 divisors, whose sum is σ = 5350665465600. Its totient is φ = 259787243520.

The previous prime is 1231334657279. The next prime is 1231334657291. The reversal of 1231334657280 is 827564331321.

1231334657280 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 33 + 46 + 572 + 8 + 0 = 666.

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 (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51355695 + ... + 51379665.

Almost surely, 2^{1231334657280} is an apocalyptic number.

1231334657280 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 1231334657280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2675332732800).

1231334657280 is an abundant number, since it is smaller than the sum of its proper divisors (4119330808320).

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

1231334657280 is a wasteful number, since it uses less digits than its factorization.

1231334657280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24032 (or 24001 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 1231334657280 in words is "one trillion, two hundred thirty-one billion, three hundred thirty-four million, six hundred fifty-seven thousand, two hundred eighty".