26515251533 has 2 divisors, whose sum is σ = 26515251534. Its totient is φ = 26515251532.

The previous prime is 26515251473. The next prime is 26515251557. The reversal of 26515251533 is 33515251562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24511972969 + 2003278564 = 156563^2 + 44758^2 .

It is a cyclic number.

It is not a de Polignac number, because 26515251533 - 2¹⁶ = 26515185997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26515251733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13257625766 + 13257625767.

It is an arithmetic number, because the mean of its divisors is an integer number (13257625767).

Almost surely, 2^26515251533 is an apocalyptic number.

It is an amenable number.

26515251533 is a deficient number, since it is larger than the sum of its proper divisors (1).

26515251533 is an equidigital number, since it uses as much as digits as its factorization.

26515251533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 38.

The spelling of 26515251533 in words is "twenty-six billion, five hundred fifteen million, two hundred fifty-one thousand, five hundred thirty-three".