61486745168 has 20 divisors (see below), whose sum is σ = 123238520340. Its totient is φ = 29683256064.

The previous prime is 61486745153. The next prime is 61486745237. The reversal of 61486745168 is 86154768416.

It can be written as a sum of positive squares in 2 ways, for example, as 37477862464 + 24008882704 = 193592^2 + 154948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66256805 + ... + 66257732.

It is an arithmetic number, because the mean of its divisors is an integer number (6161926017).

Almost surely, 2^61486745168 is an apocalyptic number.

It is an amenable number.

61486745168 is an abundant number, since it is smaller than the sum of its proper divisors (61751775172).

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

61486745168 is a wasteful number, since it uses less digits than its factorization.

61486745168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132514574 (or 132514568 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The spelling of 61486745168 in words is "sixty-one billion, four hundred eighty-six million, seven hundred forty-five thousand, one hundred sixty-eight".