641525676 has 24 divisors (see below), whose sum is σ = 1632974784. Its totient is φ = 194401680.

The previous prime is 641525659. The next prime is 641525681. The reversal of 641525676 is 676525146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2429890 + ... + 2430153.

It is an arithmetic number, because the mean of its divisors is an integer number (68040616).

Almost surely, 2^641525676 is an apocalyptic number.

641525676 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

641525676 is an abundant number, since it is smaller than the sum of its proper divisors (991449108).

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

641525676 is a wasteful number, since it uses less digits than its factorization.

641525676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860061 (or 4860059 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 641525676 is about 25328.3571516196. The cubic root of 641525676 is about 862.4581178571.

The spelling of 641525676 in words is "six hundred forty-one million, five hundred twenty-five thousand, six hundred seventy-six".