643772572060 has 24 divisors (see below), whose sum is σ = 1352776493376. Its totient is φ = 257346344640.

The previous prime is 643772571977. The next prime is 643772572063. The reversal of 643772572060 is 60275277346.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 643772571995 and 643772572013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643772572063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10135311 + ... + 10198630.

It is an arithmetic number, because the mean of its divisors is an integer number (56365687224).

Almost surely, 2^643772572060 is an apocalyptic number.

It is an amenable number.

643772572060 is an abundant number, since it is smaller than the sum of its proper divisors (709003921316).

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

643772572060 is a wasteful number, since it uses less digits than its factorization.

643772572060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335533 (or 20335531 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 49.

The spelling of 643772572060 in words is "six hundred forty-three billion, seven hundred seventy-two million, five hundred seventy-two thousand, sixty".