78281168865 has 16 divisors (see below), whose sum is σ = 125253528000. Its totient is φ = 41748737472.

The previous prime is 78281168851. The next prime is 78281168873. The reversal of 78281168865 is 56886118287.

It is not a de Polignac number, because 78281168865 - 2¹⁸ = 78280906721 is a prime.

It is a super-2 number, since 2×78281168865² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78281168799 and 78281168808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729006 + ... + 829464.

It is an arithmetic number, because the mean of its divisors is an integer number (7828345500).

Almost surely, 2^78281168865 is an apocalyptic number.

It is an amenable number.

78281168865 is a deficient number, since it is larger than the sum of its proper divisors (46972359135).

78281168865 is a wasteful number, since it uses less digits than its factorization.

78281168865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152416.

The product of its digits is 10321920, while the sum is 60.

The spelling of 78281168865 in words is "seventy-eight billion, two hundred eighty-one million, one hundred sixty-eight thousand, eight hundred sixty-five".