643150164 has 24 divisors (see below), whose sum is σ = 1507243360. Its totient is φ = 213446304.

The previous prime is 643150159. The next prime is 643150181. The reversal of 643150164 is 461051346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114274 + ... + 119769.

Almost surely, 2^643150164 is an apocalyptic number.

It is an amenable number.

643150164 is an abundant number, since it is smaller than the sum of its proper divisors (864093196).

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

643150164 is a wasteful number, since it uses less digits than its factorization.

643150164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234279 (or 234277 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 643150164 is about 25360.4054383994. The cubic root of 643150164 is about 863.1854838753.

The spelling of 643150164 in words is "six hundred forty-three million, one hundred fifty thousand, one hundred sixty-four".