16263444434261 has 2 divisors, whose sum is σ = 16263444434262. Its totient is φ = 16263444434260.

The previous prime is 16263444434183. The next prime is 16263444434287. The reversal of 16263444434261 is 16243444436261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8476721613361 + 7786722820900 = 2911481^2 + 2790470^2 .

It is a cyclic number.

It is not a de Polignac number, because 16263444434261 - 2¹⁰ = 16263444433237 is a prime.

It is a super-2 number, since 2×16263444434261² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16263444494261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8131722217130 + 8131722217131.

It is an arithmetic number, because the mean of its divisors is an integer number (8131722217131).

Almost surely, 2^{16263444434261} is an apocalyptic number.

It is an amenable number.

16263444434261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16263444434261 is an equidigital number, since it uses as much as digits as its factorization.

16263444434261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7962624, while the sum is 50.

The spelling of 16263444434261 in words is "sixteen trillion, two hundred sixty-three billion, four hundred forty-four million, four hundred thirty-four thousand, two hundred sixty-one".