16260245681 has 2 divisors, whose sum is σ = 16260245682. Its totient is φ = 16260245680.

The previous prime is 16260245569. The next prime is 16260245699. The reversal of 16260245681 is 18654206261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15211522225 + 1048723456 = 123335^2 + 32384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16260245681 is a prime.

It is a super-2 number, since 2×16260245681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16260247681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8130122840 + 8130122841.

It is an arithmetic number, because the mean of its divisors is an integer number (8130122841).

Almost surely, 2^16260245681 is an apocalyptic number.

It is an amenable number.

16260245681 is a deficient number, since it is larger than the sum of its proper divisors (1).

16260245681 is an equidigital number, since it uses as much as digits as its factorization.

16260245681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 16260245681 in words is "sixteen billion, two hundred sixty million, two hundred forty-five thousand, six hundred eighty-one".