15661083628 has 24 divisors (see below), whose sum is σ = 27518051232. Its totient is φ = 7798838784.

The previous prime is 15661083619. The next prime is 15661083649. The reversal of 15661083628 is 82638016651.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232001 + ... + 1244647.

It is an arithmetic number, because the mean of its divisors is an integer number (1146585468).

Almost surely, 2^15661083628 is an apocalyptic number.

It is an amenable number.

15661083628 is a deficient number, since it is larger than the sum of its proper divisors (11856967604).

15661083628 is a wasteful number, since it uses less digits than its factorization.

15661083628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13881 (or 13879 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 15661083628 in words is "fifteen billion, six hundred sixty-one million, eighty-three thousand, six hundred twenty-eight".