641071320 has 64 divisors (see below), whose sum is σ = 1985264640. Its totient is φ = 165436800.

The previous prime is 641071253. The next prime is 641071331. The reversal of 641071320 is 23170146.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 82446 + ... + 89885.

It is an arithmetic number, because the mean of its divisors is an integer number (31019760).

Almost surely, 2^641071320 is an apocalyptic number.

641071320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641071320 is an abundant number, since it is smaller than the sum of its proper divisors (1344193320).

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

641071320 is a wasteful number, since it uses less digits than its factorization.

641071320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172376 (or 172372 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 641071320 is about 25319.3862484856. The cubic root of 641071320 is about 862.2544598259.

The spelling of 641071320 in words is "six hundred forty-one million, seventy-one thousand, three hundred twenty".