15887838561 has 16 divisors (see below), whose sum is σ = 24372528000. Its totient is φ = 9017831808.

The previous prime is 15887838559. The next prime is 15887838581. The reversal of 15887838561 is 16583878851.

It is not a de Polignac number, because 15887838561 - 2¹ = 15887838559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15887838495 and 15887838504.

It is not an unprimeable number, because it can be changed into a prime (15887838521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2535676 + ... + 2541933.

It is an arithmetic number, because the mean of its divisors is an integer number (1523283000).

Almost surely, 2^15887838561 is an apocalyptic number.

It is an amenable number.

15887838561 is a deficient number, since it is larger than the sum of its proper divisors (8484689439).

15887838561 is a wasteful number, since it uses less digits than its factorization.

15887838561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077768.

The product of its digits is 12902400, while the sum is 60.

The spelling of 15887838561 in words is "fifteen billion, eight hundred eighty-seven million, eight hundred thirty-eight thousand, five hundred sixty-one".