87904567808 has 30 divisors (see below), whose sum is σ = 175650852399. Its totient is φ = 43948929536.

The previous prime is 87904567787. The next prime is 87904567823. The reversal of 87904567808 is 80876540978.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 43952283904 + 43952283904 = 209648^2 + 209648^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=209648.

It is a super-2 number, since 2×87904567808² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6702185 + ... + 6715287.

Almost surely, 2^87904567808 is an apocalyptic number.

It is an amenable number.

87904567808 is a deficient number, since it is larger than the sum of its proper divisors (87746284591).

87904567808 is an frugal number, since it uses more digits than its factorization.

87904567808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26224 (or 13105 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 87904567808 in words is "eighty-seven billion, nine hundred four million, five hundred sixty-seven thousand, eight hundred eight".