61656012985017 has 16 divisors (see below), whose sum is σ = 91589589891072. Its totient is φ = 36572232072720.

The previous prime is 61656012984949. The next prime is 61656012985031. The reversal of 61656012985017 is 71058921065616.

It is not a de Polignac number, because 61656012985017 - 2¹¹ = 61656012982969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61656012985067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19876211533 + ... + 19876214634.

It is an arithmetic number, because the mean of its divisors is an integer number (5724349368192).

Almost surely, 2^{61656012985017} is an apocalyptic number.

It is an amenable number.

61656012985017 is a deficient number, since it is larger than the sum of its proper divisors (29933576906055).

61656012985017 is a wasteful number, since it uses less digits than its factorization.

61656012985017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39752426228.

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 61656012985017 in words is "sixty-one trillion, six hundred fifty-six billion, twelve million, nine hundred eighty-five thousand, seventeen".