26902979773 has 2 divisors, whose sum is σ = 26902979774. Its totient is φ = 26902979772.

The previous prime is 26902979711. The next prime is 26902979783. The reversal of 26902979773 is 37797920962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24123370489 + 2779609284 = 155317^2 + 52722^2 .

It is a cyclic number.

It is not a de Polignac number, because 26902979773 - 2²¹ = 26900882621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26902979783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13451489886 + 13451489887.

It is an arithmetic number, because the mean of its divisors is an integer number (13451489887).

Almost surely, 2^26902979773 is an apocalyptic number.

It is an amenable number.

26902979773 is a deficient number, since it is larger than the sum of its proper divisors (1).

26902979773 is an equidigital number, since it uses as much as digits as its factorization.

26902979773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18003384, while the sum is 61.

The spelling of 26902979773 in words is "twenty-six billion, nine hundred two million, nine hundred seventy-nine thousand, seven hundred seventy-three".