646334265 has 16 divisors (see below), whose sum is σ = 1035590400. Its totient is φ = 344226432.

The previous prime is 646334263. The next prime is 646334279. The reversal of 646334265 is 562433646.

It is not a de Polignac number, because 646334265 - 2¹ = 646334263 is a prime.

It is a super-2 number, since 2×646334265² = 835495964226180450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646334263) 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, 19180 + ... + 40749.

It is an arithmetic number, because the mean of its divisors is an integer number (64724400).

Almost surely, 2^646334265 is an apocalyptic number.

It is an amenable number.

646334265 is a deficient number, since it is larger than the sum of its proper divisors (389256135).

646334265 is a wasteful number, since it uses less digits than its factorization.

646334265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60656.

The product of its digits is 311040, while the sum is 39.

The square root of 646334265 is about 25423.1049441251. The cubic root of 646334265 is about 864.6076227224.

The spelling of 646334265 in words is "six hundred forty-six million, three hundred thirty-four thousand, two hundred sixty-five".