641333976 has 32 divisors (see below), whose sum is σ = 1697649840. Its totient is φ = 201202688.

The previous prime is 641333971. The next prime is 641333977. The reversal of 641333976 is 679333146.

It is a super-2 number, since 2×641333976² = 822618537543937152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641333971) by changing a digit.

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, 785541 + ... + 786356.

Almost surely, 2^641333976 is an apocalyptic number.

It is an amenable number.

641333976 is an abundant number, since it is smaller than the sum of its proper divisors (1056315864).

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

641333976 is a wasteful number, since it uses less digits than its factorization.

641333976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571923 (or 1571919 counting only the distinct ones).

The product of its digits is 244944, while the sum is 42.

The square root of 641333976 is about 25324.5725728984. The cubic root of 641333976 is about 862.3722030354.

The spelling of 641333976 in words is "six hundred forty-one million, three hundred thirty-three thousand, nine hundred seventy-six".