646585646 has 16 divisors (see below), whose sum is σ = 1111152480. Its totient is φ = 276428160.

The previous prime is 646585613. The next prime is 646585663.

646585646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×646585646² = 836145995226474632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646585594 and 646585603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50735 + ... + 62186.

It is an arithmetic number, because the mean of its divisors is an integer number (69447030).

Almost surely, 2^646585646 is an apocalyptic number.

646585646 is a deficient number, since it is larger than the sum of its proper divisors (464566834).

646585646 is a wasteful number, since it uses less digits than its factorization.

646585646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113339.

The product of its digits is 4147200, while the sum is 50.

The square root of 646585646 is about 25428.0484111542. The cubic root of 646585646 is about 864.7196997951.

The spelling of 646585646 in words is "six hundred forty-six million, five hundred eighty-five thousand, six hundred forty-six".