87799647639 has 32 divisors (see below), whose sum is σ = 130456166400. Its totient is φ = 52075179360.

The previous prime is 87799647569. The next prime is 87799647641. The reversal of 87799647639 is 93674699778.

It is not a de Polignac number, because 87799647639 - 2⁷ = 87799647511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87799647659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333072 + ... + 535290.

It is an arithmetic number, because the mean of its divisors is an integer number (4076755200).

Almost surely, 2^87799647639 is an apocalyptic number.

87799647639 is a deficient number, since it is larger than the sum of its proper divisors (42656518761).

87799647639 is a wasteful number, since it uses less digits than its factorization.

87799647639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202515.

The product of its digits is 864162432, while the sum is 75.

The spelling of 87799647639 in words is "eighty-seven billion, seven hundred ninety-nine million, six hundred forty-seven thousand, six hundred thirty-nine".