163911057 has 8 divisors (see below), whose sum is σ = 219126240. Its totient is φ = 108984960.

The previous prime is 163911049. The next prime is 163911079. The reversal of 163911057 is 750119361.

It is a happy number.

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

It is not a de Polignac number, because 163911057 - 2³ = 163911049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163911757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70944 + ... + 73217.

It is an arithmetic number, because the mean of its divisors is an integer number (27390780).

Almost surely, 2^163911057 is an apocalyptic number.

It is an amenable number.

163911057 is a deficient number, since it is larger than the sum of its proper divisors (55215183).

163911057 is a wasteful number, since it uses less digits than its factorization.

163911057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144543.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 163911057 is about 12802.7753631781. The cubic root of 163911057 is about 547.2713968164.

The spelling of 163911057 in words is "one hundred sixty-three million, nine hundred eleven thousand, fifty-seven".