87704173820 has 12 divisors (see below), whose sum is σ = 184178765064. Its totient is φ = 35081669520.

The previous prime is 87704173783. The next prime is 87704173829. The reversal of 87704173820 is 2837140778.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87704173829) 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, 2192604326 + ... + 2192604365.

It is an arithmetic number, because the mean of its divisors is an integer number (15348230422).

Almost surely, 2^87704173820 is an apocalyptic number.

It is an amenable number.

87704173820 is an abundant number, since it is smaller than the sum of its proper divisors (96474591244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87704173820 is a wasteful number, since it uses less digits than its factorization.

87704173820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385208700 (or 4385208698 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 87704173820 in words is "eighty-seven billion, seven hundred four million, one hundred seventy-three thousand, eight hundred twenty".