256315545513652 has 6 divisors (see below), whose sum is σ = 448552204648898. Its totient is φ = 128157772756824.

The previous prime is 256315545513619. The next prime is 256315545513659.

256315545513652 is nontrivially palindromic in base 10.

256315545513652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 248248888999056 + 8066656514596 = 15755916^2 + 2840186^2 .

It is a super-2 number, since 2×256315545513652² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256315545513659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32039443189203 + ... + 32039443189210.

Almost surely, 2^{256315545513652} is an apocalyptic number.

It is an amenable number.

256315545513652 is a deficient number, since it is larger than the sum of its proper divisors (192236659135246).

256315545513652 is a wasteful number, since it uses less digits than its factorization.

256315545513652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64078886378417 (or 64078886378415 counting only the distinct ones).

The product of its digits is 81000000, while the sum is 58.

Adding to 256315545513652 its product of digits (81000000), we get a palindrome (256315626513652).

Subtracting from 256315545513652 its product of digits (81000000), we obtain a palindrome (256315464513652).

The spelling of 256315545513652 in words is "two hundred fifty-six trillion, three hundred fifteen billion, five hundred forty-five million, five hundred thirteen thousand, six hundred fifty-two".