26466331431 has 4 divisors (see below), whose sum is σ = 35288441912. Its totient is φ = 17644220952.

The previous prime is 26466331427. The next prime is 26466331481. The reversal of 26466331431 is 13413366462.

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

It is not a de Polignac number, because 26466331431 - 2² = 26466331427 is a prime.

It is a super-2 number, since 2×26466331431² (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 26466331431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26466331421) 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, 4411055236 + ... + 4411055241.

It is an arithmetic number, because the mean of its divisors is an integer number (8822110478).

Almost surely, 2^26466331431 is an apocalyptic number.

26466331431 is a deficient number, since it is larger than the sum of its proper divisors (8822110481).

26466331431 is an equidigital number, since it uses as much as digits as its factorization.

26466331431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8822110480.

The product of its digits is 186624, while the sum is 39.

Adding to 26466331431 its reverse (13413366462), we get a palindrome (39879697893).

The spelling of 26466331431 in words is "twenty-six billion, four hundred sixty-six million, three hundred thirty-one thousand, four hundred thirty-one".