646963152 has 80 divisors (see below), whose sum is σ = 1930537152. Its totient is φ = 184514560.

The previous prime is 646963151. The next prime is 646963181. The reversal of 646963152 is 251369646.

It is a super-2 number, since 2×646963152² = 837122640091550208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646963151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27063 + ... + 45014.

Almost surely, 2^646963152 is an apocalyptic number.

It is an amenable number.

646963152 is an abundant number, since it is smaller than the sum of its proper divisors (1283574000).

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

646963152 is a wasteful number, since it uses less digits than its factorization.

646963152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72116 (or 72110 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 646963152 is about 25435.4703514600. The cubic root of 646963152 is about 864.8879545695.

The spelling of 646963152 in words is "six hundred forty-six million, nine hundred sixty-three thousand, one hundred fifty-two".