26195243381 has 4 divisors (see below), whose sum is σ = 27040251264. Its totient is φ = 25350235500.

The previous prime is 26195243363. The next prime is 26195243419. The reversal of 26195243381 is 18334259162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18334259162 = 2 ⋅9167129581.

It is a cyclic number.

It is not a de Polignac number, because 26195243381 - 2⁶ = 26195243317 is a prime.

It is a super-2 number, since 2×26195243381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26195243981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422503895 + ... + 422503956.

It is an arithmetic number, because the mean of its divisors is an integer number (6760062816).

Almost surely, 2^26195243381 is an apocalyptic number.

It is an amenable number.

26195243381 is a deficient number, since it is larger than the sum of its proper divisors (845007883).

26195243381 is an equidigital number, since it uses as much as digits as its factorization.

26195243381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845007882.

The product of its digits is 311040, while the sum is 44.

The spelling of 26195243381 in words is "twenty-six billion, one hundred ninety-five million, two hundred forty-three thousand, three hundred eighty-one".