64057727465 has 4 divisors (see below), whose sum is σ = 76869272964. Its totient is φ = 51246181968.

The previous prime is 64057727443. The next prime is 64057727509. The reversal of 64057727465 is 56472775046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7647677401 + 56410050064 = 87451^2 + 237508^2 .

It is a cyclic number.

It is not a de Polignac number, because 64057727465 - 2⁶ = 64057727401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6405772742 + ... + 6405772751.

It is an arithmetic number, because the mean of its divisors is an integer number (19217318241).

Almost surely, 2^64057727465 is an apocalyptic number.

It is an amenable number.

64057727465 is a deficient number, since it is larger than the sum of its proper divisors (12811545499).

64057727465 is a wasteful number, since it uses less digits than its factorization.

64057727465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12811545498.

The product of its (nonzero) digits is 9878400, while the sum is 53.

The spelling of 64057727465 in words is "sixty-four billion, fifty-seven million, seven hundred twenty-seven thousand, four hundred sixty-five".