64640252701 has 16 divisors (see below), whose sum is σ = 65274577920. Its totient is φ = 64010096640.

The previous prime is 64640252693. The next prime is 64640252717. The reversal of 64640252701 is 10725204646.

It is a cyclic number.

It is not a de Polignac number, because 64640252701 - 2³ = 64640252693 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 (64640252401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44919540 + ... + 44920978.

It is an arithmetic number, because the mean of its divisors is an integer number (4079661120).

Almost surely, 2^64640252701 is an apocalyptic number.

It is an amenable number.

64640252701 is a deficient number, since it is larger than the sum of its proper divisors (634325219).

64640252701 is a wasteful number, since it uses less digits than its factorization.

64640252701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 64640252701 in words is "sixty-four billion, six hundred forty million, two hundred fifty-two thousand, seven hundred one".