81459604017 has 32 divisors (see below), whose sum is σ = 132490508160. Its totient is φ = 49054973760.

The previous prime is 81459604007. The next prime is 81459604019. The reversal of 81459604017 is 71040695418.

81459604017 is a `hidden beast` number, since 8 + 1 + 4 + 596 + 0 + 40 + 17 = 666.

It is not a de Polignac number, because 81459604017 - 2⁷ = 81459603889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81459604019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 826858 + ... + 920115.

It is an arithmetic number, because the mean of its divisors is an integer number (4140328380).

Almost surely, 2^81459604017 is an apocalyptic number.

It is an amenable number.

81459604017 is a deficient number, since it is larger than the sum of its proper divisors (51030904143).

81459604017 is a wasteful number, since it uses less digits than its factorization.

81459604017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747150 (or 1747144 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 81459604017 in words is "eighty-one billion, four hundred fifty-nine million, six hundred four thousand, seventeen".