61565561052 has 48 divisors (see below), whose sum is σ = 149921114112. Its totient is φ = 19626671680.

The previous prime is 61565561041. The next prime is 61565561069. The reversal of 61565561052 is 25016556516.

It is a junction number, because it is equal to n+sod(n) for n = 61565560995 and 61565561013.

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, 2557858 + ... + 2581814.

It is an arithmetic number, because the mean of its divisors is an integer number (3123356544).

Almost surely, 2^61565561052 is an apocalyptic number.

It is an amenable number.

61565561052 is an abundant number, since it is smaller than the sum of its proper divisors (88355553060).

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

61565561052 is a wasteful number, since it uses less digits than its factorization.

61565561052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33298 (or 33296 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 61565561052 in words is "sixty-one billion, five hundred sixty-five million, five hundred sixty-one thousand, fifty-two".