641133788 has 12 divisors (see below), whose sum is σ = 1126351632. Its totient is φ = 319319040.

The previous prime is 641133761. The next prime is 641133791. The reversal of 641133788 is 887331146.

It is a super-2 number, since 2×641133788² = 822105068230457888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 310808 + ... + 312863.

It is an arithmetic number, because the mean of its divisors is an integer number (93862636).

Almost surely, 2^641133788 is an apocalyptic number.

It is an amenable number.

641133788 is a deficient number, since it is larger than the sum of its proper divisors (485217844).

641133788 is a wasteful number, since it uses less digits than its factorization.

641133788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623932 (or 623930 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 641133788 is about 25320.6198186379. The cubic root of 641133788 is about 862.2824658425.

The spelling of 641133788 in words is "six hundred forty-one million, one hundred thirty-three thousand, seven hundred eighty-eight".