61111560656550 has 48 divisors (see below), whose sum is σ = 153259554399120. Its totient is φ = 16113310371840.

The previous prime is 61111560656539. The next prime is 61111560656551. The reversal of 61111560656550 is 5565606511116.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61111560656550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61111560656551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2288809147 + ... + 2288835846.

It is an arithmetic number, because the mean of its divisors is an integer number (3192907383315).

Almost surely, 2^{61111560656550} is an apocalyptic number.

61111560656550 is an abundant number, since it is smaller than the sum of its proper divisors (92147993742570).

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

61111560656550 is a wasteful number, since it uses less digits than its factorization.

61111560656550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577645097 (or 4577645092 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 61111560656550 in words is "sixty-one trillion, one hundred eleven billion, five hundred sixty million, six hundred fifty-six thousand, five hundred fifty".