15551665016 has 8 divisors (see below), whose sum is σ = 29159371920. Its totient is φ = 7775832504.

The previous prime is 15551665013. The next prime is 15551665021. The reversal of 15551665016 is 61056615551.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15551665013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971979056 + ... + 971979071.

It is an arithmetic number, because the mean of its divisors is an integer number (3644921490).

Almost surely, 2^15551665016 is an apocalyptic number.

It is an amenable number.

15551665016 is a deficient number, since it is larger than the sum of its proper divisors (13607706904).

15551665016 is a wasteful number, since it uses less digits than its factorization.

15551665016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943958133 (or 1943958129 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 15551665016 in words is "fifteen billion, five hundred fifty-one million, six hundred sixty-five thousand, sixteen".