87123813108 has 24 divisors (see below), whose sum is σ = 205188796512. Its totient is φ = 28769856864.

The previous prime is 87123813103. The next prime is 87123813109. The reversal of 87123813108 is 80131832178.

It is a self number, because there is not a number n which added to its sum of digits gives 87123813108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87123813103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33925435 + ... + 33928002.

It is an arithmetic number, because the mean of its divisors is an integer number (8549533188).

Almost surely, 2^87123813108 is an apocalyptic number.

It is an amenable number.

87123813108 is an abundant number, since it is smaller than the sum of its proper divisors (118064983404).

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

87123813108 is a wasteful number, since it uses less digits than its factorization.

87123813108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67853551 (or 67853549 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 87123813108 in words is "eighty-seven billion, one hundred twenty-three million, eight hundred thirteen thousand, one hundred eight".