646864701 has 16 divisors (see below), whose sum is σ = 995461248. Its totient is φ = 365976000.

The previous prime is 646864697. The next prime is 646864711. The reversal of 646864701 is 107468646.

It is not a de Polignac number, because 646864701 - 2² = 646864697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646864711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150370 + ... + 154611.

It is an arithmetic number, because the mean of its divisors is an integer number (62216328).

Almost surely, 2^646864701 is an apocalyptic number.

It is an amenable number.

646864701 is a deficient number, since it is larger than the sum of its proper divisors (348596547).

646864701 is a wasteful number, since it uses less digits than its factorization.

646864701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305092.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 646864701 is about 25433.5349686197. The cubic root of 646864701 is about 864.8440811777.

The spelling of 646864701 in words is "six hundred forty-six million, eight hundred sixty-four thousand, seven hundred one".