641611602 has 24 divisors (see below), whose sum is σ = 1438096140. Its totient is φ = 206495520.

The previous prime is 641611601. The next prime is 641611613. The reversal of 641611602 is 206116146.

641611602 is a `hidden beast` number, since 6 + 41 + 6 + 11 + 602 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 641558241 + 53361 = 25329^2 + 231^2 .

It is not an unprimeable number, because it can be changed into a prime (641611601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614049 + ... + 615092.

Almost surely, 2^641611602 is an apocalyptic number.

641611602 is an abundant number, since it is smaller than the sum of its proper divisors (796484538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641611602 is a wasteful number, since it uses less digits than its factorization.

641611602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229178 (or 1229175 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 641611602 is about 25330.0533359091. The cubic root of 641611602 is about 862.4966220410.

Adding to 641611602 its reverse (206116146), we get a palindrome (847727748).

The spelling of 641611602 in words is "six hundred forty-one million, six hundred eleven thousand, six hundred two".