78140175871843 has 4 divisors (see below), whose sum is σ = 80834664695040. Its totient is φ = 75445687048648.

The previous prime is 78140175871819. The next prime is 78140175871847. The reversal of 78140175871843 is 34817857104187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78140175871843 - 2²⁵ = 78140142317411 is a prime.

It is a super-2 number, since 2×78140175871843² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78140175871847) 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, 1347244411555 + ... + 1347244411612.

It is an arithmetic number, because the mean of its divisors is an integer number (20208666173760).

Almost surely, 2^{78140175871843} is an apocalyptic number.

78140175871843 is a deficient number, since it is larger than the sum of its proper divisors (2694488823197).

78140175871843 is a wasteful number, since it uses less digits than its factorization.

78140175871843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694488823196.

The product of its (nonzero) digits is 42147840, while the sum is 64.

The spelling of 78140175871843 in words is "seventy-eight trillion, one hundred forty billion, one hundred seventy-five million, eight hundred seventy-one thousand, eight hundred forty-three".