641568753 has 48 divisors (see below), whose sum is σ = 1086359040. Its totient is φ = 357245568.

The previous prime is 641568737. The next prime is 641568853. The reversal of 641568753 is 357865146.

It is not a de Polignac number, because 641568753 - 2⁴ = 641568737 is a prime.

It is a super-2 number, since 2×641568753² = 823220929651950018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641568699 and 641568708.

It is not an unprimeable number, because it can be changed into a prime (641568713) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1151551 + ... + 1152107.

It is an arithmetic number, because the mean of its divisors is an integer number (22632480).

Almost surely, 2^641568753 is an apocalyptic number.

641568753 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

641568753 is a deficient number, since it is larger than the sum of its proper divisors (444790287).

641568753 is a wasteful number, since it uses less digits than its factorization.

641568753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1003 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 641568753 is about 25329.2075083292. The cubic root of 641568753 is about 862.4774214631.

The spelling of 641568753 in words is "six hundred forty-one million, five hundred sixty-eight thousand, seven hundred fifty-three".