64622066439 has 16 divisors (see below), whose sum is σ = 99718200320. Its totient is φ = 36459465120.

The previous prime is 64622066417. The next prime is 64622066441. The reversal of 64622066439 is 93466022646.

It is not a de Polignac number, because 64622066439 - 2⁵ = 64622066407 is a prime.

It is a super-2 number, since 2×64622066439² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622066539) 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, 19474552 + ... + 19477869.

It is an arithmetic number, because the mean of its divisors is an integer number (6232387520).

Almost surely, 2^64622066439 is an apocalyptic number.

64622066439 is a deficient number, since it is larger than the sum of its proper divisors (35096133881).

64622066439 is a wasteful number, since it uses less digits than its factorization.

64622066439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38952510.

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 64622066439 in words is "sixty-four billion, six hundred twenty-two million, sixty-six thousand, four hundred thirty-nine".