26457040205 has 8 divisors (see below), whose sum is σ = 31849882872. Its totient is φ = 21098009088.

The previous prime is 26457040189. The next prime is 26457040213. The reversal of 26457040205 is 50204075462.

It can be written as a sum of positive squares in 4 ways, for example, as 1085966116 + 25371074089 = 32954^2 + 159283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26457040205 - 2⁴ = 26457040189 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 7 ways as a sum of consecutive naturals, for example, 8451164 + ... + 8454293.

It is an arithmetic number, because the mean of its divisors is an integer number (3981235359).

Almost surely, 2^26457040205 is an apocalyptic number.

It is an amenable number.

26457040205 is a deficient number, since it is larger than the sum of its proper divisors (5392842667).

26457040205 is a wasteful number, since it uses less digits than its factorization.

26457040205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16905775.

The product of its (nonzero) digits is 67200, while the sum is 35.

The spelling of 26457040205 in words is "twenty-six billion, four hundred fifty-seven million, forty thousand, two hundred five".