26415222401 has 4 divisors (see below), whose sum is σ = 26463514032. Its totient is φ = 26366930772.

The previous prime is 26415222391. The next prime is 26415222403. The reversal of 26415222401 is 10422251462.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26415222401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26415222403) 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, 24144995 + ... + 24146088.

It is an arithmetic number, because the mean of its divisors is an integer number (6615878508).

Almost surely, 2^26415222401 is an apocalyptic number.

It is an amenable number.

26415222401 is a deficient number, since it is larger than the sum of its proper divisors (48291631).

26415222401 is an equidigital number, since it uses as much as digits as its factorization.

26415222401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48291630.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 26415222401 its reverse (10422251462), we get a palindrome (36837473863).

The spelling of 26415222401 in words is "twenty-six billion, four hundred fifteen million, two hundred twenty-two thousand, four hundred one".