18032653278721 has 16 divisors (see below), whose sum is σ = 19611804474576. Its totient is φ = 16511213684736.

The previous prime is 18032653278713. The next prime is 18032653278733. The reversal of 18032653278721 is 12787235623081.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3640979178225 + 14391674100496 = 1908135^2 + 3793636^2 .

It is not a de Polignac number, because 18032653278721 - 2³ = 18032653278713 is a prime.

It is a super-2 number, since 2×18032653278721² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18032653278421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3491155 + ... + 6946471.

It is an arithmetic number, because the mean of its divisors is an integer number (1225737779661).

Almost surely, 2^{18032653278721} is an apocalyptic number.

It is an amenable number.

18032653278721 is a deficient number, since it is larger than the sum of its proper divisors (1579151195855).

18032653278721 is a wasteful number, since it uses less digits than its factorization.

18032653278721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463668.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 18032653278721 in words is "eighteen trillion, thirty-two billion, six hundred fifty-three million, two hundred seventy-eight thousand, seven hundred twenty-one".