256622447634072 has 64 divisors (see below), whose sum is σ = 690917635349760. Its totient is φ = 78959490768000.

The previous prime is 256622447634067. The next prime is 256622447634107. The reversal of 256622447634072 is 270436744226652.

It is a junction number, because it is equal to n+sod(n) for n = 256622447633997 and 256622447634015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13066197 + ... + 26152827.

It is an arithmetic number, because the mean of its divisors is an integer number (10795588052340).

Almost surely, 2^{256622447634072} is an apocalyptic number.

It is an amenable number.

256622447634072 is an abundant number, since it is smaller than the sum of its proper divisors (434295187715688).

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

256622447634072 is a wasteful number, since it uses less digits than its factorization.

256622447634072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13149504 (or 13149500 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 60.

The spelling of 256622447634072 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, four hundred forty-seven million, six hundred thirty-four thousand, seventy-two".