26138155 has 4 divisors (see below), whose sum is σ = 31365792. Its totient is φ = 20910520.

The previous prime is 26138149. The next prime is 26138179. The reversal of 26138155 is 55183162.

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

It is not a de Polignac number, because 26138155 - 2¹³ = 26129963 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 2613811 + ... + 2613820.

It is an arithmetic number, because the mean of its divisors is an integer number (7841448).

Almost surely, 2^26138155 is an apocalyptic number.

26138155 is a deficient number, since it is larger than the sum of its proper divisors (5227637).

26138155 is an equidigital number, since it uses as much as digits as its factorization.

26138155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227636.

The product of its digits is 7200, while the sum is 31.

The square root of 26138155 is about 5112.5487772734. The cubic root of 26138155 is about 296.7734027975.

It can be divided in two parts, 261 and 38155, that added together give a 4-th power (38416 = 14⁴).

The spelling of 26138155 in words is "twenty-six million, one hundred thirty-eight thousand, one hundred fifty-five".