641765883 has 16 divisors (see below), whose sum is σ = 933950592. Its totient is φ = 388752000.

The previous prime is 641765879. The next prime is 641765893. The reversal of 641765883 is 388567146.

It is not a de Polignac number, because 641765883 - 2² = 641765879 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641765863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86563 + ... + 93683.

It is an arithmetic number, because the mean of its divisors is an integer number (58371912).

Almost surely, 2^641765883 is an apocalyptic number.

641765883 is a deficient number, since it is larger than the sum of its proper divisors (292184709).

641765883 is a wasteful number, since it uses less digits than its factorization.

641765883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9866.

The product of its digits is 967680, while the sum is 48.

The square root of 641765883 is about 25333.0985668947. The cubic root of 641765883 is about 862.5657480650.

The spelling of 641765883 in words is "six hundred forty-one million, seven hundred sixty-five thousand, eight hundred eighty-three".