641752885 has 16 divisors (see below), whose sum is σ = 786806784. Its totient is φ = 502320832.

The previous prime is 641752849. The next prime is 641752897. The reversal of 641752885 is 588257146.

It is a cyclic number.

It is not a de Polignac number, because 641752885 - 2²⁷ = 507535157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98334 + ... + 104656.

It is an arithmetic number, because the mean of its divisors is an integer number (49175424).

Almost surely, 2^641752885 is an apocalyptic number.

It is an amenable number.

641752885 is a deficient number, since it is larger than the sum of its proper divisors (145053899).

641752885 is a wasteful number, since it uses less digits than its factorization.

641752885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764.

The product of its digits is 537600, while the sum is 46.

The square root of 641752885 is about 25332.8420237446. The cubic root of 641752885 is about 862.5599247029.

The spelling of 641752885 in words is "six hundred forty-one million, seven hundred fifty-two thousand, eight hundred eighty-five".