78187854305 has 16 divisors (see below), whose sum is σ = 103102136064. Its totient is φ = 56448823680.

The previous prime is 78187854293. The next prime is 78187854323. The reversal of 78187854305 is 50345878187.

It is not a de Polignac number, because 78187854305 - 2²⁶ = 78120745441 is a prime.

It is a super-2 number, since 2×78187854305² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

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, 5180777 + ... + 5195846.

It is an arithmetic number, because the mean of its divisors is an integer number (6443883504).

Almost surely, 2^78187854305 is an apocalyptic number.

It is an amenable number.

78187854305 is a deficient number, since it is larger than the sum of its proper divisors (24914281759).

78187854305 is a wasteful number, since it uses less digits than its factorization.

78187854305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376776.

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 78187854305 in words is "seventy-eight billion, one hundred eighty-seven million, eight hundred fifty-four thousand, three hundred five".