16263766217 has 2 divisors, whose sum is σ = 16263766218. Its totient is φ = 16263766216.

The previous prime is 16263766199. The next prime is 16263766223. The reversal of 16263766217 is 71266736261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11266548736 + 4997217481 = 106144^2 + 70691^2 .

It is a cyclic number.

It is not a de Polignac number, because 16263766217 - 2⁸ = 16263765961 is a prime.

It is a super-2 number, since 2×16263766217² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16263666217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8131883108 + 8131883109.

It is an arithmetic number, because the mean of its divisors is an integer number (8131883109).

Almost surely, 2^16263766217 is an apocalyptic number.

It is an amenable number.

16263766217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16263766217 is an equidigital number, since it uses as much as digits as its factorization.

16263766217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The spelling of 16263766217 in words is "sixteen billion, two hundred sixty-three million, seven hundred sixty-six thousand, two hundred seventeen".