78587142873 has 4 divisors (see below), whose sum is σ = 104782857168. Its totient is φ = 52391428580.

The previous prime is 78587142871. The next prime is 78587142899. The reversal of 78587142873 is 37824178587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78587142873 - 2¹ = 78587142871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78587142871) 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, 13097857143 + ... + 13097857148.

It is an arithmetic number, because the mean of its divisors is an integer number (26195714292).

Almost surely, 2^78587142873 is an apocalyptic number.

It is an amenable number.

78587142873 is a deficient number, since it is larger than the sum of its proper divisors (26195714295).

78587142873 is a wasteful number, since it uses less digits than its factorization.

78587142873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26195714294.

The product of its digits is 21073920, while the sum is 60.

The spelling of 78587142873 in words is "seventy-eight billion, five hundred eighty-seven million, one hundred forty-two thousand, eight hundred seventy-three".