645422754500 has 48 divisors (see below), whose sum is σ = 1442384815872. Its totient is φ = 252165160800.

The previous prime is 645422754497. The next prime is 645422754623. The reversal of 645422754500 is 5457224546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14988332 + ... + 15031331.

It is an arithmetic number, because the mean of its divisors is an integer number (30049683664).

Almost surely, 2^645422754500 is an apocalyptic number.

It is an amenable number.

645422754500 is an abundant number, since it is smaller than the sum of its proper divisors (796962061372).

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

645422754500 is a wasteful number, since it uses less digits than its factorization.

645422754500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30019725 (or 30019713 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 44.

The spelling of 645422754500 in words is "six hundred forty-five billion, four hundred twenty-two million, seven hundred fifty-four thousand, five hundred".