87113567878 has 4 divisors (see below), whose sum is σ = 130670351820. Its totient is φ = 43556783938.

The previous prime is 87113567839. The next prime is 87113567881. The reversal of 87113567878 is 87876531178.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21778391968 + ... + 21778391971.

It is an arithmetic number, because the mean of its divisors is an integer number (32667587955).

Almost surely, 2^87113567878 is an apocalyptic number.

87113567878 is a deficient number, since it is larger than the sum of its proper divisors (43556783942).

87113567878 is a wasteful number, since it uses less digits than its factorization.

87113567878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43556783941.

The product of its digits is 15805440, while the sum is 61.

The spelling of 87113567878 in words is "eighty-seven billion, one hundred thirteen million, five hundred sixty-seven thousand, eight hundred seventy-eight".