86254844821 has 4 divisors (see below), whose sum is σ = 86273450892. Its totient is φ = 86236238752.

The previous prime is 86254844803. The next prime is 86254844831. The reversal of 86254844821 is 12844845268.

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 2 ways, for example, as 17564200900 + 68690643921 = 132530^2 + 262089^2 .

It is a cyclic number.

It is not a de Polignac number, because 86254844821 - 2⁹ = 86254844309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86254844831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9296080 + ... + 9305353.

It is an arithmetic number, because the mean of its divisors is an integer number (21568362723).

Almost surely, 2^86254844821 is an apocalyptic number.

It is an amenable number.

86254844821 is a deficient number, since it is larger than the sum of its proper divisors (18606071).

86254844821 is a wasteful number, since it uses less digits than its factorization.

86254844821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18606070.

The product of its digits is 3932160, while the sum is 52.

The spelling of 86254844821 in words is "eighty-six billion, two hundred fifty-four million, eight hundred forty-four thousand, eight hundred twenty-one".