26572431421 has 2 divisors, whose sum is σ = 26572431422. Its totient is φ = 26572431420.

The previous prime is 26572431409. The next prime is 26572431427. The reversal of 26572431421 is 12413427562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17531084025 + 9041347396 = 132405^2 + 95086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26572431421 is a prime.

It is a super-2 number, since 2×26572431421² (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 (26572431427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13286215710 + 13286215711.

It is an arithmetic number, because the mean of its divisors is an integer number (13286215711).

Almost surely, 2^26572431421 is an apocalyptic number.

It is an amenable number.

26572431421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26572431421 is an equidigital number, since it uses as much as digits as its factorization.

26572431421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

Adding to 26572431421 its reverse (12413427562), we get a palindrome (38985858983).

The spelling of 26572431421 in words is "twenty-six billion, five hundred seventy-two million, four hundred thirty-one thousand, four hundred twenty-one".