256621012371622 has 16 divisors (see below), whose sum is σ = 387887030726832. Its totient is φ = 127328371428960.

The previous prime is 256621012371611. The next prime is 256621012371751. The reversal of 256621012371622 is 226173210126652.

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, 758822193 + ... + 759160300.

It is an arithmetic number, because the mean of its divisors is an integer number (24242939420427).

Almost surely, 2^{256621012371622} is an apocalyptic number.

256621012371622 is a deficient number, since it is larger than the sum of its proper divisors (131266018355210).

256621012371622 is a wasteful number, since it uses less digits than its factorization.

256621012371622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517983143.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 256621012371622 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, twelve million, three hundred seventy-one thousand, six hundred twenty-two".