641653611365 has 8 divisors (see below), whose sum is σ = 829213897848. Its totient is φ = 473836512960.

The previous prime is 641653611337. The next prime is 641653611419. The reversal of 641653611365 is 563116356146.

It can be written as a sum of positive squares in 4 ways, for example, as 65416246756 + 576237364609 = 255766^2 + 759103^2 .

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

It is not a de Polignac number, because 641653611365 - 2¹⁰ = 641653610341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4935796946 + ... + 4935797075.

It is an arithmetic number, because the mean of its divisors is an integer number (103651737231).

Almost surely, 2^641653611365 is an apocalyptic number.

641653611365 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

641653611365 is a deficient number, since it is larger than the sum of its proper divisors (187560286483).

641653611365 is a wasteful number, since it uses less digits than its factorization.

641653611365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871594039.

The product of its digits is 1166400, while the sum is 47.

The spelling of 641653611365 in words is "six hundred forty-one billion, six hundred fifty-three million, six hundred eleven thousand, three hundred sixty-five".