163817290972 has 12 divisors (see below), whose sum is σ = 292779839520. Its totient is φ = 80165908256.

The previous prime is 163817290969. The next prime is 163817291039. The reversal of 163817290972 is 279092718361.

It is a happy number.

It is a super-2 number, since 2×163817290972² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435684097 + ... + 435684472.

It is an arithmetic number, because the mean of its divisors is an integer number (24398319960).

Almost surely, 2^163817290972 is an apocalyptic number.

It is an amenable number.

163817290972 is a deficient number, since it is larger than the sum of its proper divisors (128962548548).

163817290972 is a wasteful number, since it uses less digits than its factorization.

163817290972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871368620 (or 871368618 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 163817290972 in words is "one hundred sixty-three billion, eight hundred seventeen million, two hundred ninety thousand, nine hundred seventy-two".