1256280368832 has 84 divisors (see below), whose sum is σ = 3602629691856. Its totient is φ = 418559070720.

The previous prime is 1256280368831. The next prime is 1256280368867. The reversal of 1256280368832 is 2388630826521.

It is a happy number.

1256280368832 is a `hidden beast` number, since 1 + 2 + 5 + 628 + 0 + 3 + 6 + 8 + 8 + 3 + 2 = 666.

It is a super-2 number, since 2×1256280368832² (a number of 25 digits) contains 22 as substring.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1256280368831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679582 + ... + 1724642.

Almost surely, 2^{1256280368832} is an apocalyptic number.

1256280368832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256280368832 is an abundant number, since it is smaller than the sum of its proper divisors (2346349323024).

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

1256280368832 is a wasteful number, since it uses less digits than its factorization.

1256280368832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047166 (or 1047153 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 1256280368832 in words is "one trillion, two hundred fifty-six billion, two hundred eighty million, three hundred sixty-eight thousand, eight hundred thirty-two".