15536872755856 has 45 divisors (see below), whose sum is σ = 30939427719291. Its totient is φ = 7558194836736.

The previous prime is 15536872755851. The next prime is 15536872755947. The reversal of 15536872755856 is 65855727863551.

The square root of 15536872755856 is 3941684.

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

It can be written as a sum of positive squares in 4 ways, for example, as 12855924986256 + 2680947769600 = 3585516^2 + 1637360^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15536872755851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 583355916 + ... + 583382548.

Almost surely, 2^{15536872755856} is an apocalyptic number.

15536872755856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15536872755856 is the 3941684-th square number.

It is an amenable number.

15536872755856 is a deficient number, since it is larger than the sum of its proper divisors (15402554963435).

15536872755856 is an frugal number, since it uses more digits than its factorization.

15536872755856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53348 (or 26672 counting only the distinct ones).

The product of its digits is 2116800000, while the sum is 73.

The spelling of 15536872755856 in words is "fifteen trillion, five hundred thirty-six billion, eight hundred seventy-two million, seven hundred fifty-five thousand, eight hundred fifty-six".