15609941868 has 18 divisors (see below), whose sum is σ = 36424207596. Its totient is φ = 5203169688.

The previous prime is 15609941857. The next prime is 15609941873. The reversal of 15609941868 is 86814990651.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 414771 + ... + 450837.

Almost surely, 2^15609941868 is an apocalyptic number.

It is an amenable number.

15609941868 is an abundant number, since it is smaller than the sum of its proper divisors (20814265728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15609941868 is an frugal number, since it uses more digits than its factorization.

15609941868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72141 (or 36072 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 15609941868 in words is "fifteen billion, six hundred nine million, nine hundred forty-one thousand, eight hundred sixty-eight".