818984549431 has 2 divisors, whose sum is σ = 818984549432. Its totient is φ = 818984549430.

The previous prime is 818984549429. The next prime is 818984549477. The reversal of 818984549431 is 134945489818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818984549431 - 2¹ = 818984549429 is a prime.

It is a super-2 number, since 2×818984549431² (a number of 25 digits) contains 22 as substring.

Together with 818984549429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818984549491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409492274715 + 409492274716.

It is an arithmetic number, because the mean of its divisors is an integer number (409492274716).

Almost surely, 2^818984549431 is an apocalyptic number.

818984549431 is a deficient number, since it is larger than the sum of its proper divisors (1).

818984549431 is an equidigital number, since it uses as much as digits as its factorization.

818984549431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39813120, while the sum is 64.

The spelling of 818984549431 in words is "eight hundred eighteen billion, nine hundred eighty-four million, five hundred forty-nine thousand, four hundred thirty-one".