256611434450744 has 32 divisors (see below), whose sum is σ = 483561838801200. Its totient is φ = 127663219031040.

The previous prime is 256611434450731. The next prime is 256611434450773. The reversal of 256611434450744 is 447054434116652.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 256611434450744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99239417 + ... + 101792360.

Almost surely, 2^{256611434450744} is an apocalyptic number.

It is an amenable number.

256611434450744 is a deficient number, since it is larger than the sum of its proper divisors (226950404350456).

256611434450744 is a wasteful number, since it uses less digits than its factorization.

256611434450744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201032583 (or 201032579 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 56.

The spelling of 256611434450744 in words is "two hundred fifty-six trillion, six hundred eleven billion, four hundred thirty-four million, four hundred fifty thousand, seven hundred forty-four".