26450111605429 has 2 divisors, whose sum is σ = 26450111605430. Its totient is φ = 26450111605428.

The previous prime is 26450111605409. The next prime is 26450111605469. The reversal of 26450111605429 is 92450611105462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19316816108100 + 7133295497329 = 4395090^2 + 2670823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26450111605429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26450111605409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13225055802714 + 13225055802715.

It is an arithmetic number, because the mean of its divisors is an integer number (13225055802715).

Almost surely, 2^{26450111605429} is an apocalyptic number.

It is an amenable number.

26450111605429 is a deficient number, since it is larger than the sum of its proper divisors (1).

26450111605429 is an equidigital number, since it uses as much as digits as its factorization.

26450111605429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 26450111605429 in words is "twenty-six trillion, four hundred fifty billion, one hundred eleven million, six hundred five thousand, four hundred twenty-nine".