64632623646 has 32 divisors (see below), whose sum is σ = 144072725760. Its totient is φ = 19209695616.

The previous prime is 64632623621. The next prime is 64632623681.

64632623646 is nontrivially palindromic in base 10.

64632623646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64632623595 and 64632623604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16673146 + ... + 16677021.

It is an arithmetic number, because the mean of its divisors is an integer number (4502272680).

Almost surely, 2^64632623646 is an apocalyptic number.

64632623646 is an abundant number, since it is smaller than the sum of its proper divisors (79440102114).

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

64632623646 is a wasteful number, since it uses less digits than its factorization.

64632623646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33350208.

The product of its digits is 4478976, while the sum is 48.

The spelling of 64632623646 in words is "sixty-four billion, six hundred thirty-two million, six hundred twenty-three thousand, six hundred forty-six".