645006000006 has 24 divisors (see below), whose sum is σ = 1410573873384. Its totient is φ = 212992634880.

The previous prime is 645005999977. The next prime is 645006000007. The reversal of 645006000006 is 600000600546.

645006000006 is a `hidden beast` number, since 6 + 4 + 50 + 0 + 600 + 0 + 0 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645006000007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167445115 + ... + 167448966.

It is an arithmetic number, because the mean of its divisors is an integer number (58773911391).

Almost surely, 2^645006000006 is an apocalyptic number.

645006000006 is an abundant number, since it is smaller than the sum of its proper divisors (765567873378).

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

645006000006 is a wasteful number, since it uses less digits than its factorization.

645006000006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334894196 (or 334894193 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 645006000006 in words is "six hundred forty-five billion, six million, six", and thus it is an aban number.