10615131256 has 8 divisors (see below), whose sum is σ = 19903371120. Its totient is φ = 5307565624.

The previous prime is 10615131253. The next prime is 10615131277. The reversal of 10615131256 is 65213151601.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×10615131256² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10615131253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663445696 + ... + 663445711.

It is an arithmetic number, because the mean of its divisors is an integer number (2487921390).

Almost surely, 2^10615131256 is an apocalyptic number.

It is an amenable number.

10615131256 is a deficient number, since it is larger than the sum of its proper divisors (9288239864).

10615131256 is a wasteful number, since it uses less digits than its factorization.

10615131256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326891413 (or 1326891409 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 10615131256 its reverse (65213151601), we get a palindrome (75828282857).

The spelling of 10615131256 in words is "ten billion, six hundred fifteen million, one hundred thirty-one thousand, two hundred fifty-six".