641411808 has 48 divisors (see below), whose sum is σ = 1699180560. Its totient is φ = 211838976.

The previous prime is 641411801. The next prime is 641411809. The reversal of 641411808 is 808114146.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×641411808² = 822818214883657728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641411801) 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, 20185 + ... + 41112.

It is an arithmetic number, because the mean of its divisors is an integer number (35399595).

Almost surely, 2^641411808 is an apocalyptic number.

It is an amenable number.

641411808 is an abundant number, since it is smaller than the sum of its proper divisors (1057768752).

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

641411808 is a wasteful number, since it uses less digits than its factorization.

641411808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61419 (or 61411 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 641411808 is about 25326.1092155901. The cubic root of 641411808 is about 862.4070873238.

The spelling of 641411808 in words is "six hundred forty-one million, four hundred eleven thousand, eight hundred eight".