87638175804 has 96 divisors (see below), whose sum is σ = 218788770816. Its totient is φ = 27206553600.

The previous prime is 87638175767. The next prime is 87638175817. The reversal of 87638175804 is 40857183678.

It is a super-2 number, since 2×87638175804² (a number of 23 digits) contains 22 as substring.

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 in 31 ways as a sum of consecutive naturals, for example, 26213757 + ... + 26217099.

It is an arithmetic number, because the mean of its divisors is an integer number (2279049696).

Almost surely, 2^87638175804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87638175804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109394385408).

87638175804 is an abundant number, since it is smaller than the sum of its proper divisors (131150595012).

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

87638175804 is a wasteful number, since it uses less digits than its factorization.

87638175804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675 (or 4673 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 87638175804 in words is "eighty-seven billion, six hundred thirty-eight million, one hundred seventy-five thousand, eight hundred four".