861318604660 has 48 divisors (see below), whose sum is σ = 1969621516800. Its totient is φ = 315139434624.

The previous prime is 861318604651. The next prime is 861318604669. The reversal of 861318604660 is 66406813168.

861318604660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (861318604651) and next prime (861318604669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861318604669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39068772 + ... + 39090811.

It is an arithmetic number, because the mean of its divisors is an integer number (41033781600).

Almost surely, 2^861318604660 is an apocalyptic number.

It is an amenable number.

861318604660 is an abundant number, since it is smaller than the sum of its proper divisors (1108302912140).

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

861318604660 is a wasteful number, since it uses less digits than its factorization.

861318604660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78159640 (or 78159638 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 861318604660 in words is "eight hundred sixty-one billion, three hundred eighteen million, six hundred four thousand, six hundred sixty".