646564007 has 6 divisors (see below), whose sum is σ = 660498768. Its totient is φ = 632636712.

The previous prime is 646563991. The next prime is 646564027. The reversal of 646564007 is 700465646.

It is not a de Polignac number, because 646564007 - 2⁴ = 646563991 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 (646564027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172469 + ... + 176177.

It is an arithmetic number, because the mean of its divisors is an integer number (110083128).

Almost surely, 2^646564007 is an apocalyptic number.

646564007 is a deficient number, since it is larger than the sum of its proper divisors (13934761).

646564007 is an frugal number, since it uses more digits than its factorization.

646564007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465 (or 3756 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 646564007 is about 25427.6229128875. The cubic root of 646564007 is about 864.7100532884.

The spelling of 646564007 in words is "six hundred forty-six million, five hundred sixty-four thousand, seven".