641270320 has 40 divisors (see below), whose sum is σ = 1519094736. Its totient is φ = 251666688.

The previous prime is 641270269. The next prime is 641270321. The reversal of 641270320 is 23072146.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×641270320² = 822455246625804800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641270321) 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, 71382 + ... + 79861.

Almost surely, 2^641270320 is an apocalyptic number.

It is an amenable number.

641270320 is an abundant number, since it is smaller than the sum of its proper divisors (877824416).

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

641270320 is a wasteful number, since it uses less digits than its factorization.

641270320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151309 (or 151303 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 641270320 is about 25323.3157386627. The cubic root of 641270320 is about 862.3436703294.

The spelling of 641270320 in words is "six hundred forty-one million, two hundred seventy thousand, three hundred twenty".