163130640 has 80 divisors (see below), whose sum is σ = 535465728. Its totient is φ = 40941568.

The previous prime is 163130633. The next prime is 163130659. The reversal of 163130640 is 46031361.

163130640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×163130640² = 53223211413619200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 163130640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15912 + ... + 24071.

Almost surely, 2^163130640 is an apocalyptic number.

163130640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163130640 is an abundant number, since it is smaller than the sum of its proper divisors (372335088).

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

163130640 is a wasteful number, since it uses less digits than its factorization.

163130640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40016 (or 40010 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 163130640 is about 12772.2605673389. The cubic root of 163130640 is about 546.4014544070.

The spelling of 163130640 in words is "one hundred sixty-three million, one hundred thirty thousand, six hundred forty".