26879737921 has 2 divisors, whose sum is σ = 26879737922. Its totient is φ = 26879737920.

The previous prime is 26879737873. The next prime is 26879737933. The reversal of 26879737921 is 12973797862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15809541696 + 11070196225 = 125736^2 + 105215^2 .

It is a cyclic number.

It is not a de Polignac number, because 26879737921 - 2¹⁷ = 26879606849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26879737921.

It is not a weakly prime, because it can be changed into another prime (26879737981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13439868960 + 13439868961.

It is an arithmetic number, because the mean of its divisors is an integer number (13439868961).

Almost surely, 2^26879737921 is an apocalyptic number.

It is an amenable number.

26879737921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26879737921 is an equidigital number, since it uses as much as digits as its factorization.

26879737921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 61.

The spelling of 26879737921 in words is "twenty-six billion, eight hundred seventy-nine million, seven hundred thirty-seven thousand, nine hundred twenty-one".