641635612 has 12 divisors (see below), whose sum is σ = 1124779320. Its totient is φ = 320270096.

The previous prime is 641635549. The next prime is 641635619. The reversal of 641635612 is 216536146.

641635612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641635612² = 823392517173229088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641635619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134287 + ... + 138982.

It is an arithmetic number, because the mean of its divisors is an integer number (93731610).

Almost surely, 2^641635612 is an apocalyptic number.

It is an amenable number.

641635612 is a deficient number, since it is larger than the sum of its proper divisors (483143708).

641635612 is a wasteful number, since it uses less digits than its factorization.

641635612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273860 (or 273858 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 641635612 is about 25330.5272744173. The cubic root of 641635612 is about 862.5073805152.

The spelling of 641635612 in words is "six hundred forty-one million, six hundred thirty-five thousand, six hundred twelve".