641195020 has 12 divisors (see below), whose sum is σ = 1346509584. Its totient is φ = 256478000.

The previous prime is 641194999. The next prime is 641195021. The reversal of 641195020 is 20591146.

641195020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641195020² = 822262107345600800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641195020.

It is not an unprimeable number, because it can be changed into a prime (641195021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16029856 + ... + 16029895.

It is an arithmetic number, because the mean of its divisors is an integer number (112209132).

Almost surely, 2^641195020 is an apocalyptic number.

It is an amenable number.

641195020 is an abundant number, since it is smaller than the sum of its proper divisors (705314564).

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

641195020 is a wasteful number, since it uses less digits than its factorization.

641195020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32059760 (or 32059758 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 641195020 is about 25321.8289228879. The cubic root of 641195020 is about 862.3099159630.

The spelling of 641195020 in words is "six hundred forty-one million, one hundred ninety-five thousand, twenty".