16265656261 has 2 divisors, whose sum is σ = 16265656262. Its totient is φ = 16265656260.

The previous prime is 16265656237. The next prime is 16265656307.

16265656261 is nontrivially palindromic in base 10.

16265656261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (16265656307) can be obtained adding 16265656261 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11910448225 + 4355208036 = 109135^2 + 65994^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16265656261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16265651261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8132828130 + 8132828131.

It is an arithmetic number, because the mean of its divisors is an integer number (8132828131).

Almost surely, 2^16265656261 is an apocalyptic number.

It is an amenable number.

16265656261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16265656261 is an equidigital number, since it uses as much as digits as its factorization.

16265656261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The spelling of 16265656261 in words is "sixteen billion, two hundred sixty-five million, six hundred fifty-six thousand, two hundred sixty-one".