26450137205 has 4 divisors (see below), whose sum is σ = 31740164652. Its totient is φ = 21160109760.

The previous prime is 26450137187. The next prime is 26450137211. The reversal of 26450137205 is 50273105462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9700083121 + 16750054084 = 98489^2 + 129422^2 .

It is not a de Polignac number, because 26450137205 - 2¹⁸ = 26449875061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2645013716 + ... + 2645013725.

It is an arithmetic number, because the mean of its divisors is an integer number (7935041163).

Almost surely, 2^26450137205 is an apocalyptic number.

It is an amenable number.

26450137205 is a deficient number, since it is larger than the sum of its proper divisors (5290027447).

26450137205 is an equidigital number, since it uses as much as digits as its factorization.

26450137205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290027446.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 26450137205 in words is "twenty-six billion, four hundred fifty million, one hundred thirty-seven thousand, two hundred five".