642725212580 has 192 divisors, whose sum is σ = 1557772425216. Its totient is φ = 220463232000.

The previous prime is 642725212561. The next prime is 642725212601. The reversal of 642725212580 is 85212527246.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 319603775 + ... + 319605785.

It is an arithmetic number, because the mean of its divisors is an integer number (8113398048).

Almost surely, 2^642725212580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642725212580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778886212608).

642725212580 is an abundant number, since it is smaller than the sum of its proper divisors (915047212636).

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

642725212580 is a wasteful number, since it uses less digits than its factorization.

642725212580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2896 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 642725212580 in words is "six hundred forty-two billion, seven hundred twenty-five million, two hundred twelve thousand, five hundred eighty".