26505881 has 2 divisors, whose sum is σ = 26505882. Its totient is φ = 26505880.

The previous prime is 26505877. The next prime is 26505889. The reversal of 26505881 is 18850562.

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., 15721225 + 10784656 = 3965^2 + 3284^2 .

It is a cyclic number.

It is not a de Polignac number, because 26505881 - 2² = 26505877 is a prime.

It is a super-2 number, since 2×26505881² = 1405123455172322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26505889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13252940 + 13252941.

It is an arithmetic number, because the mean of its divisors is an integer number (13252941).

Almost surely, 2^26505881 is an apocalyptic number.

It is an amenable number.

26505881 is a deficient number, since it is larger than the sum of its proper divisors (1).

26505881 is an equidigital number, since it uses as much as digits as its factorization.

26505881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 26505881 is about 5148.3862520211. The cubic root of 26505881 is about 298.1586508639.

The spelling of 26505881 in words is "twenty-six million, five hundred five thousand, eight hundred eighty-one".