87886505820 has 96 divisors (see below), whose sum is σ = 260636092416. Its totient is φ = 22051148800.

The previous prime is 87886505797. The next prime is 87886505873. The reversal of 87886505820 is 2850568878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3978205 + ... + 4000235.

It is an arithmetic number, because the mean of its divisors is an integer number (2714959296).

Almost surely, 2^87886505820 is an apocalyptic number.

It is an amenable number.

87886505820 is an abundant number, since it is smaller than the sum of its proper divisors (172749586596).

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

87886505820 is a wasteful number, since it uses less digits than its factorization.

87886505820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25971 (or 25969 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 57.

The spelling of 87886505820 in words is "eighty-seven billion, eight hundred eighty-six million, five hundred five thousand, eight hundred twenty".