18264497797 has 12 divisors (see below), whose sum is σ = 22880800236. Its totient is φ = 14451030720.

The previous prime is 18264497767. The next prime is 18264497803. The reversal of 18264497797 is 79779446281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4181691556 + 14082806241 = 64666^2 + 118671^2 .

It is not a de Polignac number, because 18264497797 - 2¹⁵ = 18264465029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18264497767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14335704 + ... + 14336977.

It is an arithmetic number, because the mean of its divisors is an integer number (1906733353).

Almost surely, 2^18264497797 is an apocalyptic number.

It is an amenable number.

18264497797 is a deficient number, since it is larger than the sum of its proper divisors (4616302439).

18264497797 is a wasteful number, since it uses less digits than its factorization.

18264497797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28672708 (or 28672701 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 64.

The spelling of 18264497797 in words is "eighteen billion, two hundred sixty-four million, four hundred ninety-seven thousand, seven hundred ninety-seven".