646634311 has 8 divisors (see below), whose sum is σ = 665832960. Its totient is φ = 627526368.

The previous prime is 646634297. The next prime is 646634323. The reversal of 646634311 is 113436646.

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

It is a cyclic number.

It is not a de Polignac number, because 646634311 - 2⁵ = 646634279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646634371) 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, 8071 + ... + 36856.

It is an arithmetic number, because the mean of its divisors is an integer number (83229120).

Almost surely, 2^646634311 is an apocalyptic number.

646634311 is a deficient number, since it is larger than the sum of its proper divisors (19198649).

646634311 is a wasteful number, since it uses less digits than its factorization.

646634311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45353.

The product of its digits is 31104, while the sum is 34.

The square root of 646634311 is about 25429.0053088987. The cubic root of 646634311 is about 864.7413935071.

The spelling of 646634311 in words is "six hundred forty-six million, six hundred thirty-four thousand, three hundred eleven".