26604036421 has 2 divisors, whose sum is σ = 26604036422. Its totient is φ = 26604036420.

The previous prime is 26604036391. The next prime is 26604036479. The reversal of 26604036421 is 12463040662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26216143396 + 387893025 = 161914^2 + 19695^2 .

It is a cyclic number.

It is not a de Polignac number, because 26604036421 - 2⁷ = 26604036293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26674036421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13302018210 + 13302018211.

It is an arithmetic number, because the mean of its divisors is an integer number (13302018211).

Almost surely, 2^26604036421 is an apocalyptic number.

It is an amenable number.

26604036421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26604036421 is an equidigital number, since it uses as much as digits as its factorization.

26604036421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 26604036421 in words is "twenty-six billion, six hundred four million, thirty-six thousand, four hundred twenty-one".