26190681 has 16 divisors (see below), whose sum is σ = 38277120. Its totient is φ = 15797520.

The previous prime is 26190673. The next prime is 26190713. The reversal of 26190681 is 18609162.

It is not a de Polignac number, because 26190681 - 2³ = 26190673 is a prime.

It is a super-2 number, since 2×26190681² = 1371903542487522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26190601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5580 + ... + 9138.

It is an arithmetic number, because the mean of its divisors is an integer number (2392320).

Almost surely, 2^26190681 is an apocalyptic number.

It is an amenable number.

26190681 is a deficient number, since it is larger than the sum of its proper divisors (12086439).

26190681 is a wasteful number, since it uses less digits than its factorization.

26190681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 26190681 is about 5117.6831672154. The cubic root of 26190681 is about 296.9720637148.

The spelling of 26190681 in words is "twenty-six million, one hundred ninety thousand, six hundred eighty-one".