64620684623 has 8 divisors (see below), whose sum is σ = 70498808400. Its totient is φ = 58743146880.

The previous prime is 64620684607. The next prime is 64620684629. The reversal of 64620684623 is 32648602646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64620684623 - 2⁴ = 64620684607 is a prime.

It is a super-2 number, since 2×64620684623² (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 (64620684629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102461 + ... + 373817.

It is an arithmetic number, because the mean of its divisors is an integer number (8812351050).

Almost surely, 2^64620684623 is an apocalyptic number.

64620684623 is a deficient number, since it is larger than the sum of its proper divisors (5878123777).

64620684623 is a wasteful number, since it uses less digits than its factorization.

64620684623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293017.

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 64620684623 in words is "sixty-four billion, six hundred twenty million, six hundred eighty-four thousand, six hundred twenty-three".