646117536 has 24 divisors (see below), whose sum is σ = 1696058784. Its totient is φ = 215372480.

The previous prime is 646117529. The next prime is 646117543. The reversal of 646117536 is 635711646.

It is an interprime number because it is at equal distance from previous prime (646117529) and next prime (646117543).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×646117536² = 834935740653422592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646117494 and 646117503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3365100 + ... + 3365291.

It is an arithmetic number, because the mean of its divisors is an integer number (70669116).

Almost surely, 2^646117536 is an apocalyptic number.

It is an amenable number.

646117536 is an abundant number, since it is smaller than the sum of its proper divisors (1049941248).

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

646117536 is a wasteful number, since it uses less digits than its factorization.

646117536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730404 (or 6730396 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 646117536 is about 25418.8421451489. The cubic root of 646117536 is about 864.5109717559.

The spelling of 646117536 in words is "six hundred forty-six million, one hundred seventeen thousand, five hundred thirty-six".