18056161009511 has 2 divisors, whose sum is σ = 18056161009512. Its totient is φ = 18056161009510.

The previous prime is 18056161009489. The next prime is 18056161009541. The reversal of 18056161009511 is 11590016165081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18056161009511 - 2¹⁸ = 18056160747367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18056161009541) 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 as a sum of consecutive naturals, namely, 9028080504755 + 9028080504756.

It is an arithmetic number, because the mean of its divisors is an integer number (9028080504756).

Almost surely, 2^{18056161009511} is an apocalyptic number.

18056161009511 is a deficient number, since it is larger than the sum of its proper divisors (1).

18056161009511 is an equidigital number, since it uses as much as digits as its factorization.

18056161009511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 44.

The spelling of 18056161009511 in words is "eighteen trillion, fifty-six billion, one hundred sixty-one million, nine thousand, five hundred eleven".