64622290431 has 4 divisors (see below), whose sum is σ = 86163053912. Its totient is φ = 43081526952.

The previous prime is 64622290429. The next prime is 64622290433. The reversal of 64622290431 is 13409222646.

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

It is an interprime number because it is at equal distance from previous prime (64622290429) and next prime (64622290433).

It is not a de Polignac number, because 64622290431 - 2¹ = 64622290429 is a prime.

It is a super-2 number, since 2×64622290431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64622290431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622290433) 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, 10770381736 + ... + 10770381741.

It is an arithmetic number, because the mean of its divisors is an integer number (21540763478).

Almost surely, 2^64622290431 is an apocalyptic number.

64622290431 is a deficient number, since it is larger than the sum of its proper divisors (21540763481).

64622290431 is a wasteful number, since it uses less digits than its factorization.

64622290431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21540763480.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 64622290431 in words is "sixty-four billion, six hundred twenty-two million, two hundred ninety thousand, four hundred thirty-one".