163765625120 has 24 divisors (see below), whose sum is σ = 386896289724. Its totient is φ = 65506249984.

The previous prime is 163765625117. The next prime is 163765625123. The reversal of 163765625120 is 21526567361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163765625117) and next prime (163765625123).

It can be written as a sum of positive squares in 2 ways, for example, as 163736766736 + 28858384 = 404644^2 + 5372^2 .

It is not an unprimeable number, because it can be changed into a prime (163765625123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511767419 + ... + 511767738.

Almost surely, 2^163765625120 is an apocalyptic number.

163765625120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163765625120 is an abundant number, since it is smaller than the sum of its proper divisors (223130664604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163765625120 is a wasteful number, since it uses less digits than its factorization.

163765625120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023535172 (or 1023535164 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 163765625120 in words is "one hundred sixty-three billion, seven hundred sixty-five million, six hundred twenty-five thousand, one hundred twenty".