15117065656 has 48 divisors (see below), whose sum is σ = 35969651640. Its totient is φ = 5889764160.

The previous prime is 15117065573. The next prime is 15117065657. The reversal of 15117065656 is 65656071151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15117065657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1748595 + ... + 1757218.

Almost surely, 2^15117065656 is an apocalyptic number.

It is an amenable number.

15117065656 is an abundant number, since it is smaller than the sum of its proper divisors (20852585984).

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

15117065656 is a wasteful number, since it uses less digits than its factorization.

15117065656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505844 (or 3505833 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 15117065656 in words is "fifteen billion, one hundred seventeen million, sixty-five thousand, six hundred fifty-six".