641936896 has 20 divisors (see below), whose sum is σ = 1282621032. Its totient is φ = 320968192.

The previous prime is 641936879. The next prime is 641936929. The reversal of 641936896 is 698639146.

It is a super-2 number, since 2×641936896² = 824165956892229632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626380 + ... + 627403.

Almost surely, 2^641936896 is an apocalyptic number.

It is an amenable number.

641936896 is a deficient number, since it is larger than the sum of its proper divisors (640684136).

641936896 is an equidigital number, since it uses as much as digits as its factorization.

641936896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253801 (or 1253785 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The square root of 641936896 is about 25336.4736299273. The cubic root of 641936896 is about 862.6423579626.

The spelling of 641936896 in words is "six hundred forty-one million, nine hundred thirty-six thousand, eight hundred ninety-six".