87867181874 has 4 divisors (see below), whose sum is σ = 131800772814. Its totient is φ = 43933590936.

The previous prime is 87867181873. The next prime is 87867181939. The reversal of 87867181874 is 47818176878.

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

It can be written as a sum of positive squares in only one way, i.e., 46111120225 + 41756061649 = 214735^2 + 204343^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87867181874.

It is not an unprimeable number, because it can be changed into a prime (87867181873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21966795467 + ... + 21966795470.

Almost surely, 2^87867181874 is an apocalyptic number.

87867181874 is a deficient number, since it is larger than the sum of its proper divisors (43933590940).

87867181874 is a wasteful number, since it uses less digits than its factorization.

87867181874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43933590939.

The product of its digits is 33718272, while the sum is 65.

The spelling of 87867181874 in words is "eighty-seven billion, eight hundred sixty-seven million, one hundred eighty-one thousand, eight hundred seventy-four".