26431655 has 4 divisors (see below), whose sum is σ = 31717992. Its totient is φ = 21145320.

The previous prime is 26431649. The next prime is 26431661. The reversal of 26431655 is 55613462.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (26431649) and next prime (26431661).

It is a de Polignac number, because none of the positive numbers 2^k-26431655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2643161 + ... + 2643170.

It is an arithmetic number, because the mean of its divisors is an integer number (7929498).

Almost surely, 2^26431655 is an apocalyptic number.

26431655 is a deficient number, since it is larger than the sum of its proper divisors (5286337).

26431655 is an equidigital number, since it uses as much as digits as its factorization.

26431655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286336.

The product of its digits is 21600, while the sum is 32.

The square root of 26431655 is about 5141.1725316313. The cubic root of 26431655 is about 297.8800735098.

The spelling of 26431655 in words is "twenty-six million, four hundred thirty-one thousand, six hundred fifty-five".