61125616660 has 24 divisors (see below), whose sum is σ = 128368447200. Its totient is φ = 24449360544.

The previous prime is 61125616637. The next prime is 61125616663. The reversal of 61125616660 is 6661652116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61125616663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011991 + ... + 1070689.

It is an arithmetic number, because the mean of its divisors is an integer number (5348685300).

Almost surely, 2^61125616660 is an apocalyptic number.

It is an amenable number.

61125616660 is an abundant number, since it is smaller than the sum of its proper divisors (67242830540).

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

61125616660 is a wasteful number, since it uses less digits than its factorization.

61125616660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110775 (or 110773 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 61125616660 in words is "sixty-one billion, one hundred twenty-five million, six hundred sixteen thousand, six hundred sixty".