861325660 has 48 divisors (see below), whose sum is σ = 1980972000. Its totient is φ = 312632064.

The previous prime is 861325649. The next prime is 861325679. The reversal of 861325660 is 66523168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12735 + ... + 43414.

It is an arithmetic number, because the mean of its divisors is an integer number (41270250).

Almost surely, 2^861325660 is an apocalyptic number.

It is an amenable number.

861325660 is an abundant number, since it is smaller than the sum of its proper divisors (1119646340).

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

861325660 is a wasteful number, since it uses less digits than its factorization.

861325660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56230 (or 56228 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 861325660 is about 29348.3502091685. The cubic root of 861325660 is about 951.4569187305.

The spelling of 861325660 in words is "eight hundred sixty-one million, three hundred twenty-five thousand, six hundred sixty".