61108910856 has 96 divisors (see below), whose sum is σ = 189845011200. Its totient is φ = 17395223040.

The previous prime is 61108910813. The next prime is 61108910857. The reversal of 61108910856 is 65801980116.

It is not an unprimeable number, because it can be changed into a prime (61108910857) 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, 87121 + ... + 360288.

It is an arithmetic number, because the mean of its divisors is an integer number (1977552200).

Almost surely, 2^61108910856 is an apocalyptic number.

It is an amenable number.

61108910856 is an abundant number, since it is smaller than the sum of its proper divisors (128736100344).

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

61108910856 is a wasteful number, since it uses less digits than its factorization.

61108910856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447699 (or 447692 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 61108910856 in words is "sixty-one billion, one hundred eight million, nine hundred ten thousand, eight hundred fifty-six".