26446641029 has 2 divisors, whose sum is σ = 26446641030. Its totient is φ = 26446641028.

The previous prime is 26446640993. The next prime is 26446641047. The reversal of 26446641029 is 92014664462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26373110404 + 73530625 = 162398^2 + 8575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26446641029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26446641049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13223320514 + 13223320515.

It is an arithmetic number, because the mean of its divisors is an integer number (13223320515).

Almost surely, 2^26446641029 is an apocalyptic number.

It is an amenable number.

26446641029 is a deficient number, since it is larger than the sum of its proper divisors (1).

26446641029 is an equidigital number, since it uses as much as digits as its factorization.

26446641029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 26446641029 in words is "twenty-six billion, four hundred forty-six million, six hundred forty-one thousand, twenty-nine".