87999999996 has 144 divisors (see below), whose sum is σ = 222950042784. Its totient is φ = 26916876288.

The previous prime is 87999999959. The next prime is 88000000037. The reversal of 87999999996 is 69999999978.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157988950 + ... + 157989506.

It is an arithmetic number, because the mean of its divisors is an integer number (1548264186).

Almost surely, 2^87999999996 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 87999999996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111475021392).

87999999996 is an abundant number, since it is smaller than the sum of its proper divisors (134950042788).

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

87999999996 is a wasteful number, since it uses less digits than its factorization.

87999999996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 755 counting only the distinct ones).

The product of its digits is 14463698256, while the sum is 93.

The spelling of 87999999996 in words is "eighty-seven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-six".