26814962921 has 2 divisors, whose sum is σ = 26814962922. Its totient is φ = 26814962920.

The previous prime is 26814962917. The next prime is 26814962953. The reversal of 26814962921 is 12926941862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17249144896 + 9565818025 = 131336^2 + 97805^2 .

It is a cyclic number.

It is not a de Polignac number, because 26814962921 - 2² = 26814962917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26814962921.

It is not a weakly prime, because it can be changed into another prime (26814962981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13407481460 + 13407481461.

It is an arithmetic number, because the mean of its divisors is an integer number (13407481461).

Almost surely, 2^26814962921 is an apocalyptic number.

It is an amenable number.

26814962921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26814962921 is an equidigital number, since it uses as much as digits as its factorization.

26814962921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The spelling of 26814962921 in words is "twenty-six billion, eight hundred fourteen million, nine hundred sixty-two thousand, nine hundred twenty-one".