26015881 has 2 divisors, whose sum is σ = 26015882. Its totient is φ = 26015880.

The previous prime is 26015861. The next prime is 26015893. The reversal of 26015881 is 18851062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25160256 + 855625 = 5016^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 26015881 - 2¹³ = 26007689 is a prime.

It is a super-2 number, since 2×26015881² = 1353652128412322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26015861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13007940 + 13007941.

It is an arithmetic number, because the mean of its divisors is an integer number (13007941).

Almost surely, 2^26015881 is an apocalyptic number.

It is an amenable number.

26015881 is a deficient number, since it is larger than the sum of its proper divisors (1).

26015881 is an equidigital number, since it uses as much as digits as its factorization.

26015881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 26015881 is about 5100.5765360398. The cubic root of 26015881 is about 296.3099117437.

It can be divided in two parts, 26015 and 881, that added together give a square (26896 = 164²).

The spelling of 26015881 in words is "twenty-six million, fifteen thousand, eight hundred eighty-one".