26256401819 has 4 divisors (see below), whose sum is σ = 26265818880. Its totient is φ = 26246984760.

The previous prime is 26256401813. The next prime is 26256401827. The reversal of 26256401819 is 91810465262.

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-26256401819 is a prime.

It is a super-2 number, since 2×26256401819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26256401819.

It is not an unprimeable number, because it can be changed into a prime (26256401813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4704347 + ... + 4709924.

It is an arithmetic number, because the mean of its divisors is an integer number (6566454720).

Almost surely, 2^26256401819 is an apocalyptic number.

26256401819 is a deficient number, since it is larger than the sum of its proper divisors (9417061).

26256401819 is an equidigital number, since it uses as much as digits as its factorization.

26256401819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417060.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 26256401819 in words is "twenty-six billion, two hundred fifty-six million, four hundred one thousand, eight hundred nineteen".