87990837796 has 6 divisors (see below), whose sum is σ = 153983966150. Its totient is φ = 43995418896.

The previous prime is 87990837791. The next prime is 87990837797. The reversal of 87990837796 is 69773809978.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57528022500 + 30462815296 = 239850^2 + 174536^2 .

It is not an unprimeable number, because it can be changed into a prime (87990837791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10998854721 + ... + 10998854728.

Almost surely, 2^87990837796 is an apocalyptic number.

It is an amenable number.

87990837796 is a deficient number, since it is larger than the sum of its proper divisors (65993128354).

87990837796 is a wasteful number, since it uses less digits than its factorization.

87990837796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21997709453 (or 21997709451 counting only the distinct ones).

The product of its (nonzero) digits is 288054144, while the sum is 73.

The spelling of 87990837796 in words is "eighty-seven billion, nine hundred ninety million, eight hundred thirty-seven thousand, seven hundred ninety-six".