1280275532730 has 96 divisors (see below), whose sum is σ = 3338895665664. Its totient is φ = 340363415808.

The previous prime is 1280275532729. The next prime is 1280275532749. The reversal of 1280275532730 is 372355720821.

1280275532730 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 27 + 553 + 2 + 73 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158308747 + ... + 158316833.

It is an arithmetic number, because the mean of its divisors is an integer number (34780163184).

Almost surely, 2^{1280275532730} is an apocalyptic number.

1280275532730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1280275532730 is an abundant number, since it is smaller than the sum of its proper divisors (2058620132934).

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

1280275532730 is a wasteful number, since it uses less digits than its factorization.

1280275532730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13260 (or 13257 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 1280275532730 in words is "one trillion, two hundred eighty billion, two hundred seventy-five million, five hundred thirty-two thousand, seven hundred thirty".