64156816806 has 16 divisors (see below), whose sum is σ = 128317921200. Its totient is φ = 21384891008.

The previous prime is 64156816753. The next prime is 64156816813. The reversal of 64156816806 is 60861865146.

64156816806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35650 + ... + 359978.

It is an arithmetic number, because the mean of its divisors is an integer number (8019870075).

Almost surely, 2^64156816806 is an apocalyptic number.

64156816806 is an abundant number, since it is smaller than the sum of its proper divisors (64161104394).

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

64156816806 is a wasteful number, since it uses less digits than its factorization.

64156816806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357303.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 64156816806 in words is "sixty-four billion, one hundred fifty-six million, eight hundred sixteen thousand, eight hundred six".