86686905942 has 128 divisors (see below), whose sum is σ = 238404741120. Its totient is φ = 22735935360.

The previous prime is 86686905911. The next prime is 86686905983. The reversal of 86686905942 is 24950968668.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 86686905942.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 840703 + ... + 938165.

It is an arithmetic number, because the mean of its divisors is an integer number (1862537040).

Almost surely, 2^86686905942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86686905942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119202370560).

86686905942 is an abundant number, since it is smaller than the sum of its proper divisors (151717835178).

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

86686905942 is a wasteful number, since it uses less digits than its factorization.

86686905942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97675 (or 97669 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 86686905942 in words is "eighty-six billion, six hundred eighty-six million, nine hundred five thousand, nine hundred forty-two".