18154536749 has 2 divisors, whose sum is σ = 18154536750. Its totient is φ = 18154536748.

The previous prime is 18154536731. The next prime is 18154536769. The reversal of 18154536749 is 94763545181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12268885225 + 5885651524 = 110765^2 + 76718^2 .

It is a cyclic number.

It is not a de Polignac number, because 18154536749 - 2¹⁶ = 18154471213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18154536749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18154536769) 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 as a sum of consecutive naturals, namely, 9077268374 + 9077268375.

It is an arithmetic number, because the mean of its divisors is an integer number (9077268375).

Almost surely, 2^18154536749 is an apocalyptic number.

It is an amenable number.

18154536749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18154536749 is an equidigital number, since it uses as much as digits as its factorization.

18154536749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 53.

The spelling of 18154536749 in words is "eighteen billion, one hundred fifty-four million, five hundred thirty-six thousand, seven hundred forty-nine".