26605093421 has 2 divisors, whose sum is σ = 26605093422. Its totient is φ = 26605093420.

The previous prime is 26605093373. The next prime is 26605093441. The reversal of 26605093421 is 12439050662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18942016900 + 7663076521 = 137630^2 + 87539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26605093421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26605093441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13302546710 + 13302546711.

It is an arithmetic number, because the mean of its divisors is an integer number (13302546711).

Almost surely, 2^26605093421 is an apocalyptic number.

It is an amenable number.

26605093421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26605093421 is an equidigital number, since it uses as much as digits as its factorization.

26605093421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 26605093421 in words is "twenty-six billion, six hundred five million, ninety-three thousand, four hundred twenty-one".