3123787056256 has 32 divisors (see below), whose sum is σ = 6223461363180. Its totient is φ = 1561820282880.

The previous prime is 3123787056251. The next prime is 3123787056263. The reversal of 3123787056256 is 6526507873213.

It can be written as a sum of positive squares in 2 ways, for example, as 2737171713600 + 386615342656 = 1654440^2 + 621784^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×3123787056256² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3123787056197 and 3123787056206.

It is not an unprimeable number, because it can be changed into a prime (3123787056251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220976 + ... + 3343696.

Almost surely, 2^{3123787056256} is an apocalyptic number.

It is an amenable number.

3123787056256 is a deficient number, since it is larger than the sum of its proper divisors (3099674306924).

3123787056256 is a wasteful number, since it uses less digits than its factorization.

3123787056256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144472 (or 1144460 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 3123787056256 in words is "three trillion, one hundred twenty-three billion, seven hundred eighty-seven million, fifty-six thousand, two hundred fifty-six".