256621055125334 has 64 divisors (see below), whose sum is σ = 414766289491200. Its totient is φ = 118706561880192.

The previous prime is 256621055125321. The next prime is 256621055125339. The reversal of 256621055125334 is 433521550126652.

It is a super-2 number, since 2×256621055125334² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256621055125339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1532503817 + ... + 1532671259.

It is an arithmetic number, because the mean of its divisors is an integer number (6480723273300).

Almost surely, 2^{256621055125334} is an apocalyptic number.

256621055125334 is a deficient number, since it is larger than the sum of its proper divisors (158145234365866).

256621055125334 is a wasteful number, since it uses less digits than its factorization.

256621055125334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171069.

The product of its (nonzero) digits is 6480000, while the sum is 50.

The spelling of 256621055125334 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, fifty-five million, one hundred twenty-five thousand, three hundred thirty-four".