645854706 has 48 divisors (see below), whose sum is σ = 1618553664. Its totient is φ = 182303712.

The previous prime is 645854689. The next prime is 645854723. The reversal of 645854706 is 607458546.

645854706 is a `hidden beast` number, since 64 + 585 + 4 + 7 + 0 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (645854689) and next prime (645854723).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20421 + ... + 41336.

It is an arithmetic number, because the mean of its divisors is an integer number (33719868).

Almost surely, 2^645854706 is an apocalyptic number.

645854706 is an abundant number, since it is smaller than the sum of its proper divisors (972698958).

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

645854706 is a wasteful number, since it uses less digits than its factorization.

645854706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61855 (or 61852 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 645854706 is about 25413.6716355587. The cubic root of 645854706 is about 864.3937329035.

The spelling of 645854706 in words is "six hundred forty-five million, eight hundred fifty-four thousand, seven hundred six".