15315566456 has 32 divisors (see below), whose sum is σ = 29527027200. Its totient is φ = 7444344960.

The previous prime is 15315566437. The next prime is 15315566479. The reversal of 15315566456 is 65466551351.

It is a self number, because there is not a number n which added to its sum of digits gives 15315566456.

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 7 ways as a sum of consecutive naturals, for example, 119480 + ... + 211911.

It is an arithmetic number, because the mean of its divisors is an integer number (922719600).

Almost surely, 2^15315566456 is an apocalyptic number.

It is an amenable number.

15315566456 is a deficient number, since it is larger than the sum of its proper divisors (14211460744).

15315566456 is a wasteful number, since it uses less digits than its factorization.

15315566456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331559 (or 331555 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 47.

The spelling of 15315566456 in words is "fifteen billion, three hundred fifteen million, five hundred sixty-six thousand, four hundred fifty-six".