645122106600 has 48 divisors (see below), whose sum is σ = 1999878532320. Its totient is φ = 172032561600.

The previous prime is 645122106593. The next prime is 645122106619. The reversal of 645122106600 is 6601221546.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 537601156 + ... + 537602355.

It is an arithmetic number, because the mean of its divisors is an integer number (41664136090).

Almost surely, 2^645122106600 is an apocalyptic number.

645122106600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645122106600 is an abundant number, since it is smaller than the sum of its proper divisors (1354756425720).

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

645122106600 is a wasteful number, since it uses less digits than its factorization.

645122106600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075203530 (or 1075203521 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 645122106600 in words is "six hundred forty-five billion, one hundred twenty-two million, one hundred six thousand, six hundred".