641063676 has 96 divisors (see below), whose sum is σ = 1787546880. Its totient is φ = 176512000.

The previous prime is 641063669. The next prime is 641063677. The reversal of 641063676 is 676360146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641063677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60151 + ... + 70001.

It is an arithmetic number, because the mean of its divisors is an integer number (18620280).

Almost surely, 2^641063676 is an apocalyptic number.

641063676 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641063676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893773440).

641063676 is an abundant number, since it is smaller than the sum of its proper divisors (1146483204).

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

641063676 is a wasteful number, since it uses less digits than its factorization.

641063676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9915 (or 9913 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 641063676 is about 25319.2352965093. The cubic root of 641063676 is about 862.2510326984.

The spelling of 641063676 in words is "six hundred forty-one million, sixty-three thousand, six hundred seventy-six".