78107594137 has 4 divisors (see below), whose sum is σ = 82702158516. Its totient is φ = 73513029760.

The previous prime is 78107594099. The next prime is 78107594179. The reversal of 78107594137 is 73149570187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73149570187 = 89 ⋅821905283.

It can be written as a sum of positive squares in 2 ways, for example, as 32114073616 + 45993520521 = 179204^2 + 214461^2 .

It is a cyclic number.

It is not a de Polignac number, because 78107594137 - 2²³ = 78099205529 is a prime.

It is a super-2 number, since 2×78107594137² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78107564137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2297282164 + ... + 2297282197.

It is an arithmetic number, because the mean of its divisors is an integer number (20675539629).

Almost surely, 2^78107594137 is an apocalyptic number.

It is an amenable number.

78107594137 is a deficient number, since it is larger than the sum of its proper divisors (4594564379).

78107594137 is a wasteful number, since it uses less digits than its factorization.

78107594137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594564378.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 78107594137 in words is "seventy-eight billion, one hundred seven million, five hundred ninety-four thousand, one hundred thirty-seven".