61549714872 has 24 divisors (see below), whose sum is σ = 166697144640. Its totient is φ = 20516571600.

The previous prime is 61549714843. The next prime is 61549714879. The reversal of 61549714872 is 27841794516.

61549714872 is a `hidden beast` number, since 6 + 1 + 5 + 497 + 148 + 7 + 2 = 666.

61549714872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61549714879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 427428504 + ... + 427428647.

It is an arithmetic number, because the mean of its divisors is an integer number (6945714360).

Almost surely, 2^61549714872 is an apocalyptic number.

It is an amenable number.

61549714872 is an abundant number, since it is smaller than the sum of its proper divisors (105147429768).

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

61549714872 is a wasteful number, since it uses less digits than its factorization.

61549714872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854857163 (or 854857156 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 61549714872 in words is "sixty-one billion, five hundred forty-nine million, seven hundred fourteen thousand, eight hundred seventy-two".