641653611366 has 16 divisors (see below), whose sum is σ = 1298768756544. Its totient is φ = 211307614824.

The previous prime is 641653611337. The next prime is 641653611419. The reversal of 641653611366 is 663116356146.

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, 644230036 + ... + 644231031.

It is an arithmetic number, because the mean of its divisors is an integer number (81173047284).

Almost surely, 2^641653611366 is an apocalyptic number.

641653611366 is an abundant number, since it is smaller than the sum of its proper divisors (657115145178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641653611366 is a wasteful number, since it uses less digits than its factorization.

641653611366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288461155.

The product of its digits is 1399680, while the sum is 48.

The spelling of 641653611366 in words is "six hundred forty-one billion, six hundred fifty-three million, six hundred eleven thousand, three hundred sixty-six".