87991636723104 has 48 divisors (see below), whose sum is σ = 232150523840928. Its totient is φ = 29181659549952.

The previous prime is 87991636723063. The next prime is 87991636723241. The reversal of 87991636723104 is 40132763619978.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 2326325122 + ... + 2326362945.

It is an arithmetic number, because the mean of its divisors is an integer number (4836469246686).

Almost surely, 2^{87991636723104} is an apocalyptic number.

It is an amenable number.

87991636723104 is an abundant number, since it is smaller than the sum of its proper divisors (144158887117824).

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

87991636723104 is a wasteful number, since it uses less digits than its factorization.

87991636723104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4652688277 (or 4652688269 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 66.

The spelling of 87991636723104 in words is "eighty-seven trillion, nine hundred ninety-one billion, six hundred thirty-six million, seven hundred twenty-three thousand, one hundred four".