78501483581017 has 32 divisors (see below), whose sum is σ = 91872315251712. Its totient is φ = 65677529769984.

The previous prime is 78501483580991. The next prime is 78501483581033. The reversal of 78501483581017 is 71018538410587.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78501483581017 - 2¹⁵ = 78501483548249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78501483581317) 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, 759201673 + ... + 759305065.

It is an arithmetic number, because the mean of its divisors is an integer number (2871009851616).

Almost surely, 2^{78501483581017} is an apocalyptic number.

It is an amenable number.

78501483581017 is a deficient number, since it is larger than the sum of its proper divisors (13370831670695).

78501483581017 is a wasteful number, since it uses less digits than its factorization.

78501483581017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109657.

The product of its (nonzero) digits is 7526400, while the sum is 58.

The spelling of 78501483581017 in words is "seventy-eight trillion, five hundred one billion, four hundred eighty-three million, five hundred eighty-one thousand, seventeen".