256761424167652 has 6 divisors (see below), whose sum is σ = 449332492293398. Its totient is φ = 128380712083824.

The previous prime is 256761424167637. The next prime is 256761424167683.

It is a happy number.

256761424167652 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 210370831355556 + 46390592812096 = 14504166^2 + 6811064^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32095178020953 + ... + 32095178020960.

Almost surely, 2^{256761424167652} is an apocalyptic number.

It is an amenable number.

256761424167652 is a deficient number, since it is larger than the sum of its proper divisors (192571068125746).

256761424167652 is a wasteful number, since it uses less digits than its factorization.

256761424167652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64190356041917 (or 64190356041915 counting only the distinct ones).

The product of its digits is 203212800, while the sum is 64.

The spelling of 256761424167652 in words is "two hundred fifty-six trillion, seven hundred sixty-one billion, four hundred twenty-four million, one hundred sixty-seven thousand, six hundred fifty-two".