641925120 has 136 divisors (see below), whose sum is σ = 2057290416. Its totient is φ = 170917888.

The previous prime is 641925103. The next prime is 641925131. The reversal of 641925120 is 21529146.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982714 + ... + 983366.

Almost surely, 2^641925120 is an apocalyptic number.

641925120 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 641925120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028645208).

641925120 is an abundant number, since it is smaller than the sum of its proper divisors (1415365296).

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

641925120 is an frugal number, since it uses more digits than its factorization.

641925120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 641925120 is about 25336.2412366160. The cubic root of 641925120 is about 862.6370830212.

The spelling of 641925120 in words is "six hundred forty-one million, nine hundred twenty-five thousand, one hundred twenty".