256346426164 has 6 divisors (see below), whose sum is σ = 448606245794. Its totient is φ = 128173213080.

The previous prime is 256346426159. The next prime is 256346426201. The reversal of 256346426164 is 461624643652.

It can be written as a sum of positive squares in only one way, i.e., 255522162064 + 824264100 = 505492^2 + 28710^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32043303267 + ... + 32043303274.

Almost surely, 2^256346426164 is an apocalyptic number.

It is an amenable number.

256346426164 is a deficient number, since it is larger than the sum of its proper divisors (192259819630).

256346426164 is a wasteful number, since it uses less digits than its factorization.

256346426164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64086606545 (or 64086606543 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 49.

The spelling of 256346426164 in words is "two hundred fifty-six billion, three hundred forty-six million, four hundred twenty-six thousand, one hundred sixty-four".