26814962981 has 2 divisors, whose sum is σ = 26814962982. Its totient is φ = 26814962980.

The previous prime is 26814962963. The next prime is 26814962987. The reversal of 26814962981 is 18926941862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26676688900 + 138274081 = 163330^2 + 11759^2 .

It is a cyclic number.

It is not a de Polignac number, because 26814962981 - 2⁶ = 26814962917 is a prime.

It is a super-2 number, since 2×26814962981² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26814962987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13407481490 + 13407481491.

It is an arithmetic number, because the mean of its divisors is an integer number (13407481491).

Almost surely, 2^26814962981 is an apocalyptic number.

It is an amenable number.

26814962981 is a deficient number, since it is larger than the sum of its proper divisors (1).

26814962981 is an equidigital number, since it uses as much as digits as its factorization.

26814962981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 56.

The spelling of 26814962981 in words is "twenty-six billion, eight hundred fourteen million, nine hundred sixty-two thousand, nine hundred eighty-one".