15018706772161 has 2 divisors, whose sum is σ = 15018706772162. Its totient is φ = 15018706772160.

The previous prime is 15018706772159. The next prime is 15018706772221. The reversal of 15018706772161 is 16127760781051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14946582298561 + 72124473600 = 3866081^2 + 268560^2 .

It is a cyclic number.

It is not a de Polignac number, because 15018706772161 - 2¹ = 15018706772159 is a prime.

Together with 15018706772159, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15018706772099 and 15018706772108.

It is not a weakly prime, because it can be changed into another prime (15018706770161) 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, 7509353386080 + 7509353386081.

It is an arithmetic number, because the mean of its divisors is an integer number (7509353386081).

Almost surely, 2^{15018706772161} is an apocalyptic number.

It is an amenable number.

15018706772161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15018706772161 is an equidigital number, since it uses as much as digits as its factorization.

15018706772161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 15018706772161 in words is "fifteen trillion, eighteen billion, seven hundred six million, seven hundred seventy-two thousand, one hundred sixty-one".