26264412257 has 4 divisors (see below), whose sum is σ = 26264791236. Its totient is φ = 26264033280.

The previous prime is 26264412233. The next prime is 26264412283. The reversal of 26264412257 is 75221446262.

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 8836188001 + 17428224256 = 94001^2 + 132016^2 .

It is a cyclic number.

It is not a de Polignac number, because 26264412257 - 2³⁰ = 25190670433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26264442257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52544 + ... + 235137.

It is an arithmetic number, because the mean of its divisors is an integer number (6566197809).

Almost surely, 2^26264412257 is an apocalyptic number.

It is an amenable number.

26264412257 is a deficient number, since it is larger than the sum of its proper divisors (378979).

26264412257 is an equidigital number, since it uses as much as digits as its factorization.

26264412257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378978.

The product of its digits is 322560, while the sum is 41.

The spelling of 26264412257 in words is "twenty-six billion, two hundred sixty-four million, four hundred twelve thousand, two hundred fifty-seven".