85678687658 has 8 divisors (see below), whose sum is σ = 128519273700. Its totient is φ = 42838929760.

The previous prime is 85678687639. The next prime is 85678687663.

85678687658 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 73692160369 + 11986527289 = 271463^2 + 109483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 298268 + ... + 510216.

Almost surely, 2^85678687658 is an apocalyptic number.

85678687658 is a deficient number, since it is larger than the sum of its proper divisors (42840586042).

85678687658 is a wasteful number, since it uses less digits than its factorization.

85678687658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414072.

The product of its digits is 1083801600, while the sum is 74.

The spelling of 85678687658 in words is "eighty-five billion, six hundred seventy-eight million, six hundred eighty-seven thousand, six hundred fifty-eight".