26902900681 has 2 divisors, whose sum is σ = 26902900682. Its totient is φ = 26902900680.

The previous prime is 26902900667. The next prime is 26902900691. The reversal of 26902900681 is 18600920962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24716870656 + 2186030025 = 157216^2 + 46755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26902900681 is a prime.

It is a super-2 number, since 2×26902900681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26902900691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13451450340 + 13451450341.

It is an arithmetic number, because the mean of its divisors is an integer number (13451450341).

Almost surely, 2^26902900681 is an apocalyptic number.

It is an amenable number.

26902900681 is a deficient number, since it is larger than the sum of its proper divisors (1).

26902900681 is an equidigital number, since it uses as much as digits as its factorization.

26902900681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 26902900681 in words is "twenty-six billion, nine hundred two million, nine hundred thousand, six hundred eighty-one".