26721161293 has 2 divisors, whose sum is σ = 26721161294. Its totient is φ = 26721161292.

The previous prime is 26721161287. The next prime is 26721161303. The reversal of 26721161293 is 39216112762.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14553527044 + 12167634249 = 120638^2 + 110307^2 .

It is a cyclic number.

It is not a de Polignac number, because 26721161293 - 2²⁹ = 26184290381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26721161273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360580646 + 13360580647.

It is an arithmetic number, because the mean of its divisors is an integer number (13360580647).

Almost surely, 2^26721161293 is an apocalyptic number.

It is an amenable number.

26721161293 is a deficient number, since it is larger than the sum of its proper divisors (1).

26721161293 is an equidigital number, since it uses as much as digits as its factorization.

26721161293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The spelling of 26721161293 in words is "twenty-six billion, seven hundred twenty-one million, one hundred sixty-one thousand, two hundred ninety-three".