642611045660 has 12 divisors (see below), whose sum is σ = 1349483195928. Its totient is φ = 257044418256.

The previous prime is 642611045581. The next prime is 642611045723. The reversal of 642611045660 is 66540116246.

642611045660 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-3 number, since 3×642611045660³ (a number of 36 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16065276122 + ... + 16065276161.

It is an arithmetic number, because the mean of its divisors is an integer number (112456932994).

Almost surely, 2^642611045660 is an apocalyptic number.

It is an amenable number.

642611045660 is an abundant number, since it is smaller than the sum of its proper divisors (706872150268).

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

642611045660 is a wasteful number, since it uses less digits than its factorization.

642611045660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32130552292 (or 32130552290 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 642611045660 in words is "six hundred forty-two billion, six hundred eleven million, forty-five thousand, six hundred sixty".