617661505060 has 12 divisors (see below), whose sum is σ = 1297089160668. Its totient is φ = 247064602016.

The previous prime is 617661505001. The next prime is 617661505063. The reversal of 617661505060 is 60505166716.

It can be written as a sum of positive squares in 2 ways, for example, as 233132534244 + 384528970816 = 482838^2 + 620104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 617661504998 and 617661505016.

It is not an unprimeable number, because it can be changed into a prime (617661505063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15441537607 + ... + 15441537646.

It is an arithmetic number, because the mean of its divisors is an integer number (108090763389).

Almost surely, 2^617661505060 is an apocalyptic number.

It is an amenable number.

617661505060 is an abundant number, since it is smaller than the sum of its proper divisors (679427655608).

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

617661505060 is a wasteful number, since it uses less digits than its factorization.

617661505060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30883075262 (or 30883075260 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 617661505060 in words is "six hundred seventeen billion, six hundred sixty-one million, five hundred five thousand, sixty".