64942560427 has 4 divisors (see below), whose sum is σ = 65126534040. Its totient is φ = 64758586816.

The previous prime is 64942560407. The next prime is 64942560451. The reversal of 64942560427 is 72406524946.

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-64942560427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64942560407) 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, 91986277 + ... + 91986982.

It is an arithmetic number, because the mean of its divisors is an integer number (16281633510).

Almost surely, 2^64942560427 is an apocalyptic number.

64942560427 is a deficient number, since it is larger than the sum of its proper divisors (183973613).

64942560427 is a wasteful number, since it uses less digits than its factorization.

64942560427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183973612.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 64942560427 in words is "sixty-four billion, nine hundred forty-two million, five hundred sixty thousand, four hundred twenty-seven".