256621051027534 has 32 divisors (see below), whose sum is σ = 391617808968960. Its totient is φ = 126098140027392.

The previous prime is 256621051027529. The next prime is 256621051027541. The reversal of 256621051027534 is 435720150126652.

256621051027534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256621051027534² (a number of 30 digits) contains 22 as substring.

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, 427054639 + ... + 427655125.

It is an arithmetic number, because the mean of its divisors is an integer number (12238056530280).

Almost surely, 2^{256621051027534} is an apocalyptic number.

256621051027534 is a deficient number, since it is larger than the sum of its proper divisors (134996757941426).

256621051027534 is a wasteful number, since it uses less digits than its factorization.

256621051027534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614104.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 256621051027534 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, fifty-one million, twenty-seven thousand, five hundred thirty-four".