1256397472824 has 64 divisors (see below), whose sum is σ = 3382855472640. Its totient is φ = 386555621760.

The previous prime is 1256397472819. The next prime is 1256397472859. The reversal of 1256397472824 is 4282747936521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4355229 + ... + 4634739.

It is an arithmetic number, because the mean of its divisors is an integer number (52857116760).

Almost surely, 2^{1256397472824} is an apocalyptic number.

It is an amenable number.

1256397472824 is an abundant number, since it is smaller than the sum of its proper divisors (2126457999816).

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

1256397472824 is a wasteful number, since it uses less digits than its factorization.

1256397472824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293940 (or 293936 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 60.

The spelling of 1256397472824 in words is "one trillion, two hundred fifty-six billion, three hundred ninety-seven million, four hundred seventy-two thousand, eight hundred twenty-four".