641147065 has 8 divisors (see below), whose sum is σ = 828559368. Its totient is φ = 473462400.

The previous prime is 641146999. The next prime is 641147083. The reversal of 641147065 is 560741146.

It can be written as a sum of positive squares in 4 ways, for example, as 10936249 + 630210816 = 3307^2 + 25104^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641147065 - 2⁷ = 641146937 is a prime.

It is a super-2 number, since 2×641147065² = 822139117916228450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641147065.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4931836 + ... + 4931965.

It is an arithmetic number, because the mean of its divisors is an integer number (103569921).

Almost surely, 2^641147065 is an apocalyptic number.

641147065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

641147065 is a deficient number, since it is larger than the sum of its proper divisors (187412303).

641147065 is a wasteful number, since it uses less digits than its factorization.

641147065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9863819.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 641147065 is about 25320.8819949069. The cubic root of 641147065 is about 862.2884180298.

The spelling of 641147065 in words is "six hundred forty-one million, one hundred forty-seven thousand, sixty-five".