26531056501 has 2 divisors, whose sum is σ = 26531056502. Its totient is φ = 26531056500.

The previous prime is 26531056483. The next prime is 26531056507. The reversal of 26531056501 is 10565013562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23886011601 + 2645044900 = 154551^2 + 51430^2 .

It is a cyclic number.

It is not a de Polignac number, because 26531056501 - 2¹⁷ = 26530925429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26531056507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13265528250 + 13265528251.

It is an arithmetic number, because the mean of its divisors is an integer number (13265528251).

Almost surely, 2^26531056501 is an apocalyptic number.

It is an amenable number.

26531056501 is a deficient number, since it is larger than the sum of its proper divisors (1).

26531056501 is an equidigital number, since it uses as much as digits as its factorization.

26531056501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 26531056501 in words is "twenty-six billion, five hundred thirty-one million, fifty-six thousand, five hundred one".