61565561050 has 96 divisors (see below), whose sum is σ = 135901551744. Its totient is φ = 20310912000.

The previous prime is 61565561041. The next prime is 61565561069. The reversal of 61565561050 is 5016556516.

It is a junction number, because it is equal to n+sod(n) for n = 61565560994 and 61565561012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1018165 + ... + 1076935.

It is an arithmetic number, because the mean of its divisors is an integer number (1415641164).

Almost surely, 2^61565561050 is an apocalyptic number.

61565561050 is an abundant number, since it is smaller than the sum of its proper divisors (74335990694).

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

61565561050 is a wasteful number, since it uses less digits than its factorization.

61565561050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58904 (or 58899 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 61565561050 in words is "sixty-one billion, five hundred sixty-five million, five hundred sixty-one thousand, fifty".