645052572000 has 480 divisors, whose sum is σ = 2470523799744. Its totient is φ = 164533248000.

The previous prime is 645052571959. The next prime is 645052572013. The reversal of 645052572000 is 275250546.

645052572000 is a `hidden beast` number, since 64 + 5 + 0 + 525 + 72 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7408720 + ... + 7495280.

Almost surely, 2^645052572000 is an apocalyptic number.

645052572000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645052572000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235261899872).

645052572000 is an abundant number, since it is smaller than the sum of its proper divisors (1825471227744).

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

645052572000 is a wasteful number, since it uses less digits than its factorization.

645052572000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86621 (or 86594 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The spelling of 645052572000 in words is "six hundred forty-five billion, fifty-two million, five hundred seventy-two thousand".