64465710691 has 4 divisors (see below), whose sum is σ = 64469802232. Its totient is φ = 64461619152.

The previous prime is 64465710677. The next prime is 64465710713. The reversal of 64465710691 is 19601756446.

64465710691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64465710691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64465710191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2022045 + ... + 2053678.

It is an arithmetic number, because the mean of its divisors is an integer number (16117450558).

Almost surely, 2^64465710691 is an apocalyptic number.

64465710691 is a deficient number, since it is larger than the sum of its proper divisors (4091541).

64465710691 is a wasteful number, since it uses less digits than its factorization.

64465710691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091540.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 64465710691 in words is "sixty-four billion, four hundred sixty-five million, seven hundred ten thousand, six hundred ninety-one".