64642114578 has 32 divisors (see below), whose sum is σ = 131568648192. Its totient is φ = 21168781200.

The previous prime is 64642114577. The next prime is 64642114591. The reversal of 64642114578 is 87541124646.

It is not an unprimeable number, because it can be changed into a prime (64642114573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147538 + ... + 388653.

It is an arithmetic number, because the mean of its divisors is an integer number (4111520256).

Almost surely, 2^64642114578 is an apocalyptic number.

64642114578 is an abundant number, since it is smaller than the sum of its proper divisors (66926533614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64642114578 is a wasteful number, since it uses less digits than its factorization.

64642114578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536550.

The product of its digits is 1290240, while the sum is 48.

The spelling of 64642114578 in words is "sixty-four billion, six hundred forty-two million, one hundred fourteen thousand, five hundred seventy-eight".