85991848766041 has 3 divisors (see below), whose sum is σ = 85991858039221. Its totient is φ = 85991839492862.

The previous prime is 85991848766027. The next prime is 85991848766137. The reversal of 85991848766041 is 14066784819958.

The square root of 85991848766041 is 9273179.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 85991848766041 - 2²⁵ = 85991815211609 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85991848769041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4636590 + ... + 13909768.

Almost surely, 2^{85991848766041} is an apocalyptic number.

85991848766041 is the 9273179-th square number.

85991848766041 is the 4636590-th centered octagonal number.

It is an amenable number.

85991848766041 is a deficient number, since it is larger than the sum of its proper divisors (9273180).

85991848766041 is an frugal number, since it uses more digits than its factorization.

85991848766041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18546358 (or 9273179 counting only the distinct ones).

The product of its (nonzero) digits is 836075520, while the sum is 76.

The spelling of 85991848766041 in words is "eighty-five trillion, nine hundred ninety-one billion, eight hundred forty-eight million, seven hundred sixty-six thousand, forty-one".