64702565716 has 6 divisors (see below), whose sum is σ = 113229490010. Its totient is φ = 32351282856.

The previous prime is 64702565699. The next prime is 64702565717. The reversal of 64702565716 is 61756520746.

It can be written as a sum of positive squares in only one way, i.e., 55799888400 + 8902677316 = 236220^2 + 94354^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64702565716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64702565717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8087820711 + ... + 8087820718.

Almost surely, 2^64702565716 is an apocalyptic number.

It is an amenable number.

64702565716 is a deficient number, since it is larger than the sum of its proper divisors (48526924294).

64702565716 is a wasteful number, since it uses less digits than its factorization.

64702565716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16175641433 (or 16175641431 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 64702565716 in words is "sixty-four billion, seven hundred two million, five hundred sixty-five thousand, seven hundred sixteen".