15812056516 has 9 divisors (see below), whose sum is σ = 27671539021. Its totient is φ = 7905902512.

The previous prime is 15812056511. The next prime is 15812056531. The reversal of 15812056516 is 61565021851.

The square root of 15812056516 is 125746.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14464872900 + 1347183616 = 120270^2 + 36704^2 .

It is a super-2 number, since 2×15812056516² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15812056511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 220056 + ... + 282928.

Almost surely, 2^15812056516 is an apocalyptic number.

15812056516 is the 125746-th square number.

It is an amenable number.

15812056516 is a deficient number, since it is larger than the sum of its proper divisors (11859482505).

15812056516 is an frugal number, since it uses more digits than its factorization.

15812056516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125750 (or 62875 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 15812056516 in words is "fifteen billion, eight hundred twelve million, fifty-six thousand, five hundred sixteen".