646077313 has 8 divisors (see below), whose sum is σ = 758330432. Its totient is φ = 538813296.

The previous prime is 646077307. The next prime is 646077319. The reversal of 646077313 is 313770646.

It is an interprime number because it is at equal distance from previous prime (646077307) and next prime (646077319).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646077313 - 2⁵ = 646077281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646077319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246995 + ... + 1247512.

It is an arithmetic number, because the mean of its divisors is an integer number (94791304).

Almost surely, 2^646077313 is an apocalyptic number.

It is an amenable number.

646077313 is a deficient number, since it is larger than the sum of its proper divisors (112253119).

646077313 is a wasteful number, since it uses less digits than its factorization.

646077313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494551.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 646077313 is about 25418.0509284249. The cubic root of 646077313 is about 864.4930318072.

The spelling of 646077313 in words is "six hundred forty-six million, seventy-seven thousand, three hundred thirteen".