163320975811 has 12 divisors (see below), whose sum is σ = 191352435960. Its totient is φ = 138982284000.

The previous prime is 163320975787. The next prime is 163320975869. The reversal of 163320975811 is 118579023361.

It is a happy number.

It is not a de Polignac number, because 163320975811 - 2²⁷ = 163186758083 is a prime.

It is a super-2 number, since 2×163320975811² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163320975211) 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, 11982690 + ... + 11996311.

It is an arithmetic number, because the mean of its divisors is an integer number (15946036330).

Almost surely, 2^163320975811 is an apocalyptic number.

163320975811 is a deficient number, since it is larger than the sum of its proper divisors (28031460149).

163320975811 is a wasteful number, since it uses less digits than its factorization.

163320975811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23979154 (or 23979147 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 163320975811 in words is "one hundred sixty-three billion, three hundred twenty million, nine hundred seventy-five thousand, eight hundred eleven".