85836724553218 has 4 divisors (see below), whose sum is σ = 128755086829830. Its totient is φ = 42918362276608.

The previous prime is 85836724553149. The next prime is 85836724553243. The reversal of 85836724553218 is 81235542763858.

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., 81141775984129 + 4694948569089 = 9007873^2 + 2166783^2 .

It is a super-3 number, since 3×85836724553218³ (a number of 43 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21459181138303 + ... + 21459181138306.

Almost surely, 2^{85836724553218} is an apocalyptic number.

85836724553218 is a deficient number, since it is larger than the sum of its proper divisors (42918362276612).

85836724553218 is a wasteful number, since it uses less digits than its factorization.

85836724553218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42918362276611.

The product of its digits is 387072000, while the sum is 67.

The spelling of 85836724553218 in words is "eighty-five trillion, eight hundred thirty-six billion, seven hundred twenty-four million, five hundred fifty-three thousand, two hundred eighteen".