163907579857 has 16 divisors (see below), whose sum is σ = 187994899840. Its totient is φ = 139988932992.

The previous prime is 163907579839. The next prime is 163907579911. The reversal of 163907579857 is 758975709361.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163907579857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163907579792 and 163907579801.

It is not an unprimeable number, because it can be changed into a prime (163907579827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2920018 + ... + 2975620.

It is an arithmetic number, because the mean of its divisors is an integer number (11749681240).

Almost surely, 2^163907579857 is an apocalyptic number.

It is an amenable number.

163907579857 is a deficient number, since it is larger than the sum of its proper divisors (24087319983).

163907579857 is a wasteful number, since it uses less digits than its factorization.

163907579857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57112.

The product of its (nonzero) digits is 100018800, while the sum is 67.

The spelling of 163907579857 in words is "one hundred sixty-three billion, nine hundred seven million, five hundred seventy-nine thousand, eight hundred fifty-seven".