641100136 has 16 divisors (see below), whose sum is σ = 1222437600. Its totient is φ = 315116784.

The previous prime is 641100133. The next prime is 641100193. The reversal of 641100136 is 631001146.

It is a happy number.

It is a super-2 number, since 2×641100136² = 822018768758436992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641100133) 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, 678660 + ... + 679603.

It is an arithmetic number, because the mean of its divisors is an integer number (76402350).

Almost surely, 2^641100136 is an apocalyptic number.

It is an amenable number.

641100136 is a deficient number, since it is larger than the sum of its proper divisors (581337464).

641100136 is a wasteful number, since it uses less digits than its factorization.

641100136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358328 (or 1358324 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 641100136 is about 25319.9552922196. The cubic root of 641100136 is about 862.2673790084.

The spelling of 641100136 in words is "six hundred forty-one million, one hundred thousand, one hundred thirty-six".