26421812447 has 2 divisors, whose sum is σ = 26421812448. Its totient is φ = 26421812446.

The previous prime is 26421812429. The next prime is 26421812497. The reversal of 26421812447 is 74421812462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26421812447 - 2⁶ = 26421812383 is a prime.

It is a super-2 number, since 2×26421812447² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26421812407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13210906223 + 13210906224.

It is an arithmetic number, because the mean of its divisors is an integer number (13210906224).

Almost surely, 2^26421812447 is an apocalyptic number.

26421812447 is a deficient number, since it is larger than the sum of its proper divisors (1).

26421812447 is an equidigital number, since it uses as much as digits as its factorization.

26421812447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 41.

The spelling of 26421812447 in words is "twenty-six billion, four hundred twenty-one million, eight hundred twelve thousand, four hundred forty-seven".