641898291238 has 16 divisors (see below), whose sum is σ = 1022106327840. Its totient is φ = 301293248896.

The previous prime is 641898291233. The next prime is 641898291311. The reversal of 641898291238 is 832192898146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641898291233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24253306 + ... + 24279757.

It is an arithmetic number, because the mean of its divisors is an integer number (63881645490).

Almost surely, 2^641898291238 is an apocalyptic number.

641898291238 is a deficient number, since it is larger than the sum of its proper divisors (380208036602).

641898291238 is a wasteful number, since it uses less digits than its factorization.

641898291238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48533471.

The product of its digits is 11943936, while the sum is 61.

The spelling of 641898291238 in words is "six hundred forty-one billion, eight hundred ninety-eight million, two hundred ninety-one thousand, two hundred thirty-eight".