15505156668 has 12 divisors (see below), whose sum is σ = 36178698920. Its totient is φ = 5168385552.

The previous prime is 15505156657. The next prime is 15505156687. The reversal of 15505156668 is 86665150551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 646048183 + ... + 646048206.

Almost surely, 2^15505156668 is an apocalyptic number.

It is an amenable number.

15505156668 is an abundant number, since it is smaller than the sum of its proper divisors (20673542252).

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

15505156668 is a wasteful number, since it uses less digits than its factorization.

15505156668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292096396 (or 1292096394 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 15505156668 in words is "fifteen billion, five hundred five million, one hundred fifty-six thousand, six hundred sixty-eight".