61776445104 has 60 divisors (see below), whose sum is σ = 188605363752. Its totient is φ = 18720134400.

The previous prime is 61776445097. The next prime is 61776445139. The reversal of 61776445104 is 40154467716.

61776445104 is a `hidden beast` number, since 6 + 1 + 77 + 64 + 4 + 510 + 4 = 666.

61776445104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61776445104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19498557 + ... + 19501724.

Almost surely, 2^61776445104 is an apocalyptic number.

It is an amenable number.

61776445104 is an abundant number, since it is smaller than the sum of its proper divisors (126828918648).

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

61776445104 is a wasteful number, since it uses less digits than its factorization.

61776445104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39000306 (or 39000297 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 61776445104 in words is "sixty-one billion, seven hundred seventy-six million, four hundred forty-five thousand, one hundred four".