61613766880389 has 6 divisors (see below), whose sum is σ = 88997663271686. Its totient is φ = 41075844586920.

The previous prime is 61613766880331. The next prime is 61613766880399. The reversal of 61613766880389 is 98308866731616.

61613766880389 is a `hidden beast` number, since 6 + 161 + 3 + 7 + 6 + 6 + 8 + 80 + 389 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61272730736100 + 341036144289 = 7827690^2 + 583983^2 .

It is not a de Polignac number, because 61613766880389 - 2⁷ = 61613766880261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61613766880399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3422987048902 + ... + 3422987048919.

Almost surely, 2^{61613766880389} is an apocalyptic number.

It is an amenable number.

61613766880389 is a deficient number, since it is larger than the sum of its proper divisors (27383896391297).

61613766880389 is a wasteful number, since it uses less digits than its factorization.

61613766880389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845974097827 (or 6845974097824 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 72.

The spelling of 61613766880389 in words is "sixty-one trillion, six hundred thirteen billion, seven hundred sixty-six million, eight hundred eighty thousand, three hundred eighty-nine".