87031837726866 has 24 divisors (see below), whose sum is σ = 188569807545600. Its totient is φ = 29010485528856.

The previous prime is 87031837726859. The next prime is 87031837726877. The reversal of 87031837726866 is 66862773813078.

It is a junction number, because it is equal to n+sod(n) for n = 87031837726794 and 87031837726803.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6316266 + ... + 14627333.

It is an arithmetic number, because the mean of its divisors is an integer number (7857075314400).

Almost surely, 2^{87031837726866} is an apocalyptic number.

87031837726866 is an abundant number, since it is smaller than the sum of its proper divisors (101537969818734).

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

87031837726866 is a wasteful number, since it uses less digits than its factorization.

87031837726866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21174470 (or 21174467 counting only the distinct ones).

The product of its (nonzero) digits is 682795008, while the sum is 72.

The spelling of 87031837726866 in words is "eighty-seven trillion, thirty-one billion, eight hundred thirty-seven million, seven hundred twenty-six thousand, eight hundred sixty-six".