80729140878 has 24 divisors (see below), whose sum is σ = 174919857528. Its totient is φ = 26908679952.

The previous prime is 80729140819. The next prime is 80729140951. The reversal of 80729140878 is 87804192708.

It is a happy number.

80729140878 is a `hidden beast` number, since 80 + 7 + 2 + 91 + 408 + 78 = 666.

It is a super-2 number, since 2×80729140878² (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 11 ways as a sum of consecutive naturals, for example, 505176 + ... + 645492.

It is an arithmetic number, because the mean of its divisors is an integer number (7288327397).

Almost surely, 2^80729140878 is an apocalyptic number.

80729140878 is an abundant number, since it is smaller than the sum of its proper divisors (94190716650).

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

80729140878 is a wasteful number, since it uses less digits than its factorization.

80729140878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172288 (or 172285 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 80729140878 in words is "eighty billion, seven hundred twenty-nine million, one hundred forty thousand, eight hundred seventy-eight".