641195568 has 320 divisors, whose sum is σ = 2133196800. Its totient is φ = 182891520.

The previous prime is 641195557. The next prime is 641195617. The reversal of 641195568 is 865591146.

It is a super-2 number, since 2×641195568² = 822263512845685248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5048721 + ... + 5048847.

It is an arithmetic number, because the mean of its divisors is an integer number (6666240).

Almost surely, 2^641195568 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 641195568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066598400).

641195568 is an abundant number, since it is smaller than the sum of its proper divisors (1492001232).

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

641195568 is a wasteful number, since it uses less digits than its factorization.

641195568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 205 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 641195568 is about 25321.8397435889. The cubic root of 641195568 is about 862.3101616218.

The spelling of 641195568 in words is "six hundred forty-one million, one hundred ninety-five thousand, five hundred sixty-eight".