641513113561 has 8 divisors (see below), whose sum is σ = 649648454400. Its totient is φ = 633378145920.

The previous prime is 641513113529. The next prime is 641513113573. The reversal of 641513113561 is 165311315146.

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

It is a cyclic number.

It is not a de Polignac number, because 641513113561 - 2⁵ = 641513113529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641513113561.

It is not an unprimeable number, because it can be changed into a prime (641513813561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5411241 + ... + 5528521.

It is an arithmetic number, because the mean of its divisors is an integer number (81206056800).

Almost surely, 2^641513113561 is an apocalyptic number.

It is an amenable number.

641513113561 is a deficient number, since it is larger than the sum of its proper divisors (8135340839).

641513113561 is a wasteful number, since it uses less digits than its factorization.

641513113561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186599.

The product of its digits is 32400, while the sum is 37.

The spelling of 641513113561 in words is "six hundred forty-one billion, five hundred thirteen million, one hundred thirteen thousand, five hundred sixty-one".