18156355582753 has 2 divisors, whose sum is σ = 18156355582754. Its totient is φ = 18156355582752.

The previous prime is 18156355582721. The next prime is 18156355582793. The reversal of 18156355582753 is 35728555365181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13106658977344 + 5049696605409 = 3620312^2 + 2247153^2 .

It is a cyclic number.

It is not a de Polignac number, because 18156355582753 - 2⁵ = 18156355582721 is a prime.

It is not a weakly prime, because it can be changed into another prime (18156355582793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9078177791376 + 9078177791377.

It is an arithmetic number, because the mean of its divisors is an integer number (9078177791377).

Almost surely, 2^{18156355582753} is an apocalyptic number.

It is an amenable number.

18156355582753 is a deficient number, since it is larger than the sum of its proper divisors (1).

18156355582753 is an equidigital number, since it uses as much as digits as its factorization.

18156355582753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200000, while the sum is 64.

The spelling of 18156355582753 in words is "eighteen trillion, one hundred fifty-six billion, three hundred fifty-five million, five hundred eighty-two thousand, seven hundred fifty-three".