26389161493 has 2 divisors, whose sum is σ = 26389161494. Its totient is φ = 26389161492.

The previous prime is 26389161479. The next prime is 26389161553. The reversal of 26389161493 is 39416198362.

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., 23421853764 + 2967307729 = 153042^2 + 54473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26389161493 is a prime.

It is a super-3 number, since 3×26389161493³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26389161493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26389161413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13194580746 + 13194580747.

It is an arithmetic number, because the mean of its divisors is an integer number (13194580747).

Almost surely, 2^26389161493 is an apocalyptic number.

It is an amenable number.

26389161493 is a deficient number, since it is larger than the sum of its proper divisors (1).

26389161493 is an equidigital number, since it uses as much as digits as its factorization.

26389161493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 52.

The spelling of 26389161493 in words is "twenty-six billion, three hundred eighty-nine million, one hundred sixty-one thousand, four hundred ninety-three".