641842456 has 32 divisors (see below), whose sum is σ = 1218097440. Its totient is φ = 317041408.

The previous prime is 641842447. The next prime is 641842469. The reversal of 641842456 is 654248146.

It is a super-2 number, since 2×641842456² = 823923476648223872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229740 + ... + 232516.

It is an arithmetic number, because the mean of its divisors is an integer number (38065545).

Almost surely, 2^641842456 is an apocalyptic number.

It is an amenable number.

641842456 is a deficient number, since it is larger than the sum of its proper divisors (576254984).

641842456 is a wasteful number, since it uses less digits than its factorization.

641842456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123 (or 3119 counting only the distinct ones).

The product of its digits is 184320, while the sum is 40.

The square root of 641842456 is about 25334.6098450322. The cubic root of 641842456 is about 862.6000526933.

The spelling of 641842456 in words is "six hundred forty-one million, eight hundred forty-two thousand, four hundred fifty-six".