85854868531 has 2 divisors, whose sum is σ = 85854868532. Its totient is φ = 85854868530.

The previous prime is 85854868483. The next prime is 85854868553. The reversal of 85854868531 is 13586845858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85854868531 - 2⁷ = 85854868403 is a prime.

It is a super-2 number, since 2×85854868531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85854868531.

It is not a weakly prime, because it can be changed into another prime (85854878531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42927434265 + 42927434266.

It is an arithmetic number, because the mean of its divisors is an integer number (42927434266).

Almost surely, 2^85854868531 is an apocalyptic number.

85854868531 is a deficient number, since it is larger than the sum of its proper divisors (1).

85854868531 is an equidigital number, since it uses as much as digits as its factorization.

85854868531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864000, while the sum is 61.

The spelling of 85854868531 in words is "eighty-five billion, eight hundred fifty-four million, eight hundred sixty-eight thousand, five hundred thirty-one".