87136287874 has 16 divisors (see below), whose sum is σ = 134127728280. Its totient is φ = 42430781440.

The previous prime is 87136287781. The next prime is 87136287877. The reversal of 87136287874 is 47878263178.

It can be written as a sum of positive squares in 4 ways, for example, as 44738595225 + 42397692649 = 211515^2 + 205907^2 .

It is not an unprimeable number, because it can be changed into a prime (87136287877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887119 + ... + 980434.

Almost surely, 2^87136287874 is an apocalyptic number.

87136287874 is a deficient number, since it is larger than the sum of its proper divisors (46991440406).

87136287874 is a wasteful number, since it uses less digits than its factorization.

87136287874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868165.

The product of its digits is 25288704, while the sum is 61.

The spelling of 87136287874 in words is "eighty-seven billion, one hundred thirty-six million, two hundred eighty-seven thousand, eight hundred seventy-four".