26288912521 has 2 divisors, whose sum is σ = 26288912522. Its totient is φ = 26288912520.

The previous prime is 26288912509. The next prime is 26288912527. The reversal of 26288912521 is 12521988262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25603520121 + 685392400 = 160011^2 + 26180^2 .

It is a cyclic number.

It is not a de Polignac number, because 26288912521 - 2¹⁹ = 26288388233 is a prime.

It is a super-2 number, since 2×26288912521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26288912527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13144456260 + 13144456261.

It is an arithmetic number, because the mean of its divisors is an integer number (13144456261).

Almost surely, 2^26288912521 is an apocalyptic number.

It is an amenable number.

26288912521 is a deficient number, since it is larger than the sum of its proper divisors (1).

26288912521 is an equidigital number, since it uses as much as digits as its factorization.

26288912521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 46.

The spelling of 26288912521 in words is "twenty-six billion, two hundred eighty-eight million, nine hundred twelve thousand, five hundred twenty-one".