645677612706 has 16 divisors (see below), whose sum is σ = 1475834543424. Its totient is φ = 184479317904.

The previous prime is 645677612669. The next prime is 645677612777. The reversal of 645677612706 is 607216776546.

645677612706 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 7 ways as a sum of consecutive naturals, for example, 7686638205 + ... + 7686638288.

It is an arithmetic number, because the mean of its divisors is an integer number (92239658964).

Almost surely, 2^645677612706 is an apocalyptic number.

645677612706 is an abundant number, since it is smaller than the sum of its proper divisors (830156930718).

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

645677612706 is a wasteful number, since it uses less digits than its factorization.

645677612706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15373276505.

The product of its (nonzero) digits is 17781120, while the sum is 57.

The spelling of 645677612706 in words is "six hundred forty-five billion, six hundred seventy-seven million, six hundred twelve thousand, seven hundred six".