15663475057 has 8 divisors (see below), whose sum is σ = 16143956640. Its totient is φ = 15187681440.

The previous prime is 15663475043. The next prime is 15663475063. The reversal of 15663475057 is 75057436651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15663475057 - 2⁷ = 15663474929 is a prime.

It is a super-2 number, since 2×15663475057² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15663475057.

It is not an unprimeable number, because it can be changed into a prime (15663475097) by changing a digit.

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, 1165207 + ... + 1178572.

It is an arithmetic number, because the mean of its divisors is an integer number (2017994580).

Almost surely, 2^15663475057 is an apocalyptic number.

It is an amenable number.

15663475057 is a deficient number, since it is larger than the sum of its proper divisors (480481583).

15663475057 is a wasteful number, since it uses less digits than its factorization.

15663475057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343983.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 15663475057 in words is "fifteen billion, six hundred sixty-three million, four hundred seventy-five thousand, fifty-seven".