646982795 has 4 divisors (see below), whose sum is σ = 776379360. Its totient is φ = 517586232.

The previous prime is 646982789. The next prime is 646982807. The reversal of 646982795 is 597289646.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646982795 - 2²² = 642788491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646982795.

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, 64698275 + ... + 64698284.

It is an arithmetic number, because the mean of its divisors is an integer number (194094840).

Almost surely, 2^646982795 is an apocalyptic number.

646982795 is a deficient number, since it is larger than the sum of its proper divisors (129396565).

646982795 is a wasteful number, since it uses less digits than its factorization.

646982795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129396564.

The product of its digits is 6531840, while the sum is 56.

The square root of 646982795 is about 25435.8564825327. The cubic root of 646982795 is about 864.8967076812.

The spelling of 646982795 in words is "six hundred forty-six million, nine hundred eighty-two thousand, seven hundred ninety-five".