14127256981 has 2 divisors, whose sum is σ = 14127256982. Its totient is φ = 14127256980.

The previous prime is 14127256967. The next prime is 14127256991. The reversal of 14127256981 is 18965272141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7407356356 + 6719900625 = 86066^2 + 81975^2 .

It is a cyclic number.

It is not a de Polignac number, because 14127256981 - 2⁹ = 14127256469 is a prime.

It is a super-2 number, since 2×14127256981² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14127256961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7063628490 + 7063628491.

It is an arithmetic number, because the mean of its divisors is an integer number (7063628491).

Almost surely, 2^14127256981 is an apocalyptic number.

It is an amenable number.

14127256981 is a deficient number, since it is larger than the sum of its proper divisors (1).

14127256981 is an equidigital number, since it uses as much as digits as its factorization.

14127256981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The spelling of 14127256981 in words is "fourteen billion, one hundred twenty-seven million, two hundred fifty-six thousand, nine hundred eighty-one".