87969591636 has 24 divisors (see below), whose sum is σ = 210268781184. Its totient is φ = 28607997120.

The previous prime is 87969591631. The next prime is 87969591659. The reversal of 87969591636 is 63619596978.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87969591631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 89399500 + ... + 89400483.

It is an arithmetic number, because the mean of its divisors is an integer number (8761199216).

Almost surely, 2^87969591636 is an apocalyptic number.

It is an amenable number.

87969591636 is an abundant number, since it is smaller than the sum of its proper divisors (122299189548).

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

87969591636 is a wasteful number, since it uses less digits than its factorization.

87969591636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178800031 (or 178800029 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 69.

The spelling of 87969591636 in words is "eighty-seven billion, nine hundred sixty-nine million, five hundred ninety-one thousand, six hundred thirty-six".