87139893178 has 16 divisors (see below), whose sum is σ = 143150283360. Its totient is φ = 39536743536.

The previous prime is 87139893163. The next prime is 87139893199.

87139893178 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28401300 + ... + 28404367.

It is an arithmetic number, because the mean of its divisors is an integer number (8946892710).

Almost surely, 2^87139893178 is an apocalyptic number.

87139893178 is a deficient number, since it is larger than the sum of its proper divisors (56010390182).

87139893178 is a wasteful number, since it uses less digits than its factorization.

87139893178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56805741.

The product of its digits is 18289152, while the sum is 64.

The spelling of 87139893178 in words is "eighty-seven billion, one hundred thirty-nine million, eight hundred ninety-three thousand, one hundred seventy-eight".