86185780834 has 4 divisors (see below), whose sum is σ = 129278671254. Its totient is φ = 43092890416.

The previous prime is 86185780823. The next prime is 86185780841. The reversal of 86185780834 is 43808758168.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77365753609 + 8820027225 = 278147^2 + 93915^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21546445207 + ... + 21546445210.

Almost surely, 2^86185780834 is an apocalyptic number.

86185780834 is a deficient number, since it is larger than the sum of its proper divisors (43092890420).

86185780834 is a wasteful number, since it uses less digits than its factorization.

86185780834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43092890419.

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 86185780834 in words is "eighty-six billion, one hundred eighty-five million, seven hundred eighty thousand, eight hundred thirty-four".