78870043139 has 4 divisors (see below), whose sum is σ = 78881274024. Its totient is φ = 78858812256.

The previous prime is 78870043127. The next prime is 78870043159. The reversal of 78870043139 is 93134007887.

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 78870043139 - 2⁴ = 78870043123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78870043159) 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, 5604902 + ... + 5618955.

It is an arithmetic number, because the mean of its divisors is an integer number (19720318506).

Almost surely, 2^78870043139 is an apocalyptic number.

78870043139 is a deficient number, since it is larger than the sum of its proper divisors (11230885).

78870043139 is a wasteful number, since it uses less digits than its factorization.

78870043139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11230884.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 78870043139 in words is "seventy-eight billion, eight hundred seventy million, forty-three thousand, one hundred thirty-nine".