87990837808 has 20 divisors (see below), whose sum is σ = 172536253848. Its totient is φ = 43465352960.

The previous prime is 87990837797. The next prime is 87990837827. The reversal of 87990837808 is 80873809978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33127753 + ... + 33130408.

Almost surely, 2^87990837808 is an apocalyptic number.

It is an amenable number.

87990837808 is a deficient number, since it is larger than the sum of its proper divisors (84545416040).

87990837808 is a wasteful number, since it uses less digits than its factorization.

87990837808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66258252 (or 66258246 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 67.

The spelling of 87990837808 in words is "eighty-seven billion, nine hundred ninety million, eight hundred thirty-seven thousand, eight hundred eight".