641676480 has 112 divisors (see below), whose sum is σ = 2046207744. Its totient is φ = 170368000.

The previous prime is 641676467. The next prime is 641676499. The reversal of 641676480 is 84676146.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239629 + ... + 242291.

It is an arithmetic number, because the mean of its divisors is an integer number (18269712).

Almost surely, 2^641676480 is an apocalyptic number.

641676480 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 641676480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023103872).

641676480 is an abundant number, since it is smaller than the sum of its proper divisors (1404531264).

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

641676480 is a wasteful number, since it uses less digits than its factorization.

641676480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934 (or 2924 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 641676480 is about 25331.3339561895. Note that the first 3 decimals coincide. The cubic root of 641676480 is about 862.5256921563.

The spelling of 641676480 in words is "six hundred forty-one million, six hundred seventy-six thousand, four hundred eighty".