87991122112 has 28 divisors (see below), whose sum is σ = 174810760360. Its totient is φ = 43944316416.

The previous prime is 87991122061. The next prime is 87991122127. The reversal of 87991122112 is 21122119978.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745293 + ... + 855244.

Almost surely, 2^87991122112 is an apocalyptic number.

It is an amenable number.

87991122112 is a deficient number, since it is larger than the sum of its proper divisors (86819638248).

87991122112 is a wasteful number, since it uses less digits than its factorization.

87991122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601408 (or 1601398 counting only the distinct ones).

The product of its digits is 36288, while the sum is 43.

The spelling of 87991122112 in words is "eighty-seven billion, nine hundred ninety-one million, one hundred twenty-two thousand, one hundred twelve".