26351330431 has 4 divisors (see below), whose sum is σ = 26360989200. Its totient is φ = 26341671664.

The previous prime is 26351330387. The next prime is 26351330449. The reversal of 26351330431 is 13403315362.

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 26351330431 - 2¹⁵ = 26351297663 is a prime.

It is a super-2 number, since 2×26351330431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26351330393 and 26351330402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26351330491) 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, 4825291 + ... + 4830748.

It is an arithmetic number, because the mean of its divisors is an integer number (6590247300).

Almost surely, 2^26351330431 is an apocalyptic number.

26351330431 is a deficient number, since it is larger than the sum of its proper divisors (9658769).

26351330431 is an equidigital number, since it uses as much as digits as its factorization.

26351330431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9658768.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 26351330431 its reverse (13403315362), we get a palindrome (39754645793).

The spelling of 26351330431 in words is "twenty-six billion, three hundred fifty-one million, three hundred thirty thousand, four hundred thirty-one".