256621652226102 has 8 divisors (see below), whose sum is σ = 513243304452216. Its totient is φ = 85540550742032.

The previous prime is 256621652226077. The next prime is 256621652226119. The reversal of 256621652226102 is 201622256126652.

It is a sphenic number, since it is the product of 3 distinct primes.

256621652226102 is an admirable number.

It is a super-2 number, since 2×256621652226102² (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 3 ways as a sum of consecutive naturals, for example, 21385137685503 + ... + 21385137685514.

It is an arithmetic number, because the mean of its divisors is an integer number (64155413056527).

Almost surely, 2^{256621652226102} is an apocalyptic number.

256621652226102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256621652226102 is a wasteful number, since it uses less digits than its factorization.

256621652226102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42770275371022.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 256621652226102 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, six hundred fifty-two million, two hundred twenty-six thousand, one hundred two".