641685495 has 32 divisors (see below), whose sum is σ = 1124907264. Its totient is φ = 309766400.

The previous prime is 641685467. The next prime is 641685497. The reversal of 641685495 is 594586146.

It is not a de Polignac number, because 641685495 - 2⁵ = 641685463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641685497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30100 + ... + 46790.

It is an arithmetic number, because the mean of its divisors is an integer number (35153352).

Almost surely, 2^641685495 is an apocalyptic number.

641685495 is a deficient number, since it is larger than the sum of its proper divisors (483221769).

641685495 is a wasteful number, since it uses less digits than its factorization.

641685495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16943.

The product of its digits is 1036800, while the sum is 48.

The square root of 641685495 is about 25331.5118972398. The cubic root of 641685495 is about 862.5297313843.

The spelling of 641685495 in words is "six hundred forty-one million, six hundred eighty-five thousand, four hundred ninety-five".