15661005116 has 6 divisors (see below), whose sum is σ = 27406758960. Its totient is φ = 7830502556.

The previous prime is 15661005089. The next prime is 15661005137. The reversal of 15661005116 is 61150016651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957625636 + ... + 1957625643.

It is an arithmetic number, because the mean of its divisors is an integer number (4567793160).

Almost surely, 2^15661005116 is an apocalyptic number.

It is an amenable number.

15661005116 is a deficient number, since it is larger than the sum of its proper divisors (11745753844).

15661005116 is a wasteful number, since it uses less digits than its factorization.

15661005116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915251283 (or 3915251281 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 15661005116 in words is "fifteen billion, six hundred sixty-one million, five thousand, one hundred sixteen".