26401445431 has 4 divisors (see below), whose sum is σ = 26403855912. Its totient is φ = 26399034952.

The previous prime is 26401445393. The next prime is 26401445437. The reversal of 26401445431 is 13454410462.

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

It is a cyclic number.

It is not a de Polignac number, because 26401445431 - 2⁷ = 26401445303 is a prime.

It is a super-2 number, since 2×26401445431² (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 (26401445437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188736 + ... + 1210741.

It is an arithmetic number, because the mean of its divisors is an integer number (6600963978).

Almost surely, 2^26401445431 is an apocalyptic number.

26401445431 is a deficient number, since it is larger than the sum of its proper divisors (2410481).

26401445431 is a wasteful number, since it uses less digits than its factorization.

26401445431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410480.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 26401445431 its reverse (13454410462), we get a palindrome (39855855893).

The spelling of 26401445431 in words is "twenty-six billion, four hundred one million, four hundred forty-five thousand, four hundred thirty-one".