26432579821 has 2 divisors, whose sum is σ = 26432579822. Its totient is φ = 26432579820.

The previous prime is 26432579791. The next prime is 26432579851. The reversal of 26432579821 is 12897523462.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (26432579791) and next prime (26432579851).

It can be written as a sum of positive squares in only one way, i.e., 18410690596 + 8021889225 = 135686^2 + 89565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26432579821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26432579851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13216289910 + 13216289911.

It is an arithmetic number, because the mean of its divisors is an integer number (13216289911).

Almost surely, 2^26432579821 is an apocalyptic number.

It is an amenable number.

26432579821 is a deficient number, since it is larger than the sum of its proper divisors (1).

26432579821 is an equidigital number, since it uses as much as digits as its factorization.

26432579821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The spelling of 26432579821 in words is "twenty-six billion, four hundred thirty-two million, five hundred seventy-nine thousand, eight hundred twenty-one".