64605636906 has 32 divisors (see below), whose sum is σ = 129508761600. Its totient is φ = 21485689200.

The previous prime is 64605636869. The next prime is 64605636917. The reversal of 64605636906 is 60963650646.

64605636906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5097205 + ... + 5109863.

It is an arithmetic number, because the mean of its divisors is an integer number (4047148800).

Almost surely, 2^64605636906 is an apocalyptic number.

64605636906 is an abundant number, since it is smaller than the sum of its proper divisors (64903124694).

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

64605636906 is a wasteful number, since it uses less digits than its factorization.

64605636906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14554.

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 64605636906 in words is "sixty-four billion, six hundred five million, six hundred thirty-six thousand, nine hundred six".