78536047138177 has 4 divisors (see below), whose sum is σ = 78557510942640. Its totient is φ = 78514583333716.

The previous prime is 78536047138139. The next prime is 78536047138183. The reversal of 78536047138177 is 77183174063587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78536047138177 - 2³⁵ = 78501687399809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78536047135177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10731896743 + ... + 10731904060.

It is an arithmetic number, because the mean of its divisors is an integer number (19639377735660).

Almost surely, 2^{78536047138177} is an apocalyptic number.

It is an amenable number.

78536047138177 is a deficient number, since it is larger than the sum of its proper divisors (21463804463).

78536047138177 is a wasteful number, since it uses less digits than its factorization.

78536047138177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21463804462.

The product of its (nonzero) digits is 165957120, while the sum is 67.

The spelling of 78536047138177 in words is "seventy-eight trillion, five hundred thirty-six billion, forty-seven million, one hundred thirty-eight thousand, one hundred seventy-seven".