85929986018431 has 2 divisors, whose sum is σ = 85929986018432. Its totient is φ = 85929986018430.

The previous prime is 85929986018323. The next prime is 85929986018441. The reversal of 85929986018431 is 13481068992958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85929986018431 - 2²¹ = 85929983921279 is a prime.

It is a super-2 number, since 2×85929986018431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85929986018441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42964993009215 + 42964993009216.

It is an arithmetic number, because the mean of its divisors is an integer number (42964993009216).

Almost surely, 2^{85929986018431} is an apocalyptic number.

85929986018431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85929986018431 is an equidigital number, since it uses as much as digits as its factorization.

85929986018431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268738560, while the sum is 73.

The spelling of 85929986018431 in words is "eighty-five trillion, nine hundred twenty-nine billion, nine hundred eighty-six million, eighteen thousand, four hundred thirty-one".