26332572421 has 2 divisors, whose sum is σ = 26332572422. Its totient is φ = 26332572420.

The previous prime is 26332572317. The next prime is 26332572491. The reversal of 26332572421 is 12427523362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22624371396 + 3708201025 = 150414^2 + 60895^2 .

It is a cyclic number.

It is not a de Polignac number, because 26332572421 - 2¹⁷ = 26332441349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26332572491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13166286210 + 13166286211.

It is an arithmetic number, because the mean of its divisors is an integer number (13166286211).

Almost surely, 2^26332572421 is an apocalyptic number.

It is an amenable number.

26332572421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26332572421 is an equidigital number, since it uses as much as digits as its factorization.

26332572421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The spelling of 26332572421 in words is "twenty-six billion, three hundred thirty-two million, five hundred seventy-two thousand, four hundred twenty-one".