61565605115660 has 48 divisors (see below), whose sum is σ = 134438954277600. Its totient is φ = 23653864034304.

The previous prime is 61565605115639. The next prime is 61565605115683. The reversal of 61565605115660 is 6651150656516.

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, 274881830 + ... + 275105709.

It is an arithmetic number, because the mean of its divisors is an integer number (2800811547450).

Almost surely, 2^{61565605115660} is an apocalyptic number.

It is an amenable number.

61565605115660 is an abundant number, since it is smaller than the sum of its proper divisors (72873349161940).

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

61565605115660 is a wasteful number, since it uses less digits than its factorization.

61565605115660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549987770 (or 549987768 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 61565605115660 in words is "sixty-one trillion, five hundred sixty-five billion, six hundred five million, one hundred fifteen thousand, six hundred sixty".