641420364 has 48 divisors (see below), whose sum is σ = 1617390432. Its totient is φ = 196672512.

The previous prime is 641420333. The next prime is 641420371. The reversal of 641420364 is 463024146.

It is a super-2 number, since 2×641420364² = 822840166707784992, which contains 22 as substring.

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, 38692 + ... + 52724.

It is an arithmetic number, because the mean of its divisors is an integer number (33695634).

Almost surely, 2^641420364 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 641420364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808695216).

641420364 is an abundant number, since it is smaller than the sum of its proper divisors (975970068).

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

641420364 is a wasteful number, since it uses less digits than its factorization.

641420364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14346 (or 14344 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 641420364 is about 25326.2781316166. The cubic root of 641420364 is about 862.4109219494.

The spelling of 641420364 in words is "six hundred forty-one million, four hundred twenty thousand, three hundred sixty-four".