15882253538 has 6 divisors (see below), whose sum is σ = 23823647649. Its totient is φ = 7941037656.

The previous prime is 15882253493. The next prime is 15882253561. The reversal of 15882253538 is 83535228851.

It can be written as a sum of positive squares in 2 ways, for example, as 15817338289 + 64915249 = 125767^2 + 8057^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=89113.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 133670 + ... + 222782.

Almost surely, 2^15882253538 is an apocalyptic number.

15882253538 is a deficient number, since it is larger than the sum of its proper divisors (7941394111).

15882253538 is an frugal number, since it uses more digits than its factorization.

15882253538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178228 (or 89115 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 50.

Multiplying 15882253538 by its sum of digits (50), we get a square (794112676900 = 891130²).

The spelling of 15882253538 in words is "fifteen billion, eight hundred eighty-two million, two hundred fifty-three thousand, five hundred thirty-eight".