16265622181 has 2 divisors, whose sum is σ = 16265622182. Its totient is φ = 16265622180.

The previous prime is 16265622179. The next prime is 16265622203. The reversal of 16265622181 is 18122656261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9404150625 + 6861471556 = 96975^2 + 82834^2 .

It is an emirp because it is prime and its reverse (18122656261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16265622181 - 2¹ = 16265622179 is a prime.

It is a super-2 number, since 2×16265622181² (a number of 21 digits) contains 22 as substring.

Together with 16265622179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16265622161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8132811090 + 8132811091.

It is an arithmetic number, because the mean of its divisors is an integer number (8132811091).

Almost surely, 2^16265622181 is an apocalyptic number.

It is an amenable number.

16265622181 is a deficient number, since it is larger than the sum of its proper divisors (1).

16265622181 is an equidigital number, since it uses as much as digits as its factorization.

16265622181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The spelling of 16265622181 in words is "sixteen billion, two hundred sixty-five million, six hundred twenty-two thousand, one hundred eighty-one".