61717943407077 has 48 divisors (see below), whose sum is σ = 91850971929600. Its totient is φ = 39920108117760.

The previous prime is 61717943407067. The next prime is 61717943407123. The reversal of 61717943407077 is 77070434971716.

61717943407077 is a `hidden beast` number, since 6 + 1 + 71 + 7 + 94 + 3 + 407 + 0 + 77 = 666.

It is not a de Polignac number, because 61717943407077 - 2¹⁴ = 61717943390693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61717943407007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11871799 + ... + 16259627.

It is an arithmetic number, because the mean of its divisors is an integer number (1913561915200).

Almost surely, 2^{61717943407077} is an apocalyptic number.

It is an amenable number.

61717943407077 is a deficient number, since it is larger than the sum of its proper divisors (30133028522523).

61717943407077 is a wasteful number, since it uses less digits than its factorization.

61717943407077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388258 (or 4388255 counting only the distinct ones).

The product of its (nonzero) digits is 43563744, while the sum is 63.

The spelling of 61717943407077 in words is "sixty-one trillion, seven hundred seventeen billion, nine hundred forty-three million, four hundred seven thousand, seventy-seven".