61757605112 has 24 divisors (see below), whose sum is σ = 134700899760. Its totient is φ = 26467544880.

The previous prime is 61757605093. The next prime is 61757605163. The reversal of 61757605112 is 21150675716.

It is a self number, because there is not a number n which added to its sum of digits gives 61757605112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78772064 + ... + 78772847.

It is an arithmetic number, because the mean of its divisors is an integer number (5612537490).

Almost surely, 2^61757605112 is an apocalyptic number.

It is an amenable number.

61757605112 is an abundant number, since it is smaller than the sum of its proper divisors (72943294648).

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

61757605112 is a wasteful number, since it uses less digits than its factorization.

61757605112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157544931 (or 157544920 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 61757605112 in words is "sixty-one billion, seven hundred fifty-seven million, six hundred five thousand, one hundred twelve".