26155019 has 4 divisors (see below), whose sum is σ = 28532760. Its totient is φ = 23777280.

The previous prime is 26155009. The next prime is 26155021. The reversal of 26155019 is 91055162.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26155019 is a prime.

It is a super-2 number, since 2×26155019² = 1368170037780722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26154982 and 26155000.

It is not an unprimeable number, because it can be changed into a prime (26155009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188854 + ... + 1188875.

It is an arithmetic number, because the mean of its divisors is an integer number (7133190).

Almost surely, 2^26155019 is an apocalyptic number.

26155019 is a deficient number, since it is larger than the sum of its proper divisors (2377741).

26155019 is a wasteful number, since it uses less digits than its factorization.

26155019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377740.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 26155019 is about 5114.1977865546. The cubic root of 26155019 is about 296.8372138649.

The spelling of 26155019 in words is "twenty-six million, one hundred fifty-five thousand, nineteen".