78718672134 has 12 divisors (see below), whose sum is σ = 170557122996. Its totient is φ = 26239557372.

The previous prime is 78718672037. The next prime is 78718672147. The reversal of 78718672134 is 43127681787.

It is a super-2 number, since 2×78718672134² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2186629764 + ... + 2186629799.

It is an arithmetic number, because the mean of its divisors is an integer number (14213093583).

Almost surely, 2^78718672134 is an apocalyptic number.

78718672134 is an abundant number, since it is smaller than the sum of its proper divisors (91838450862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78718672134 is a wasteful number, since it uses less digits than its factorization.

78718672134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373259571 (or 4373259568 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The spelling of 78718672134 in words is "seventy-eight billion, seven hundred eighteen million, six hundred seventy-two thousand, one hundred thirty-four".