26251722667 has 4 divisors (see below), whose sum is σ = 26256916840. Its totient is φ = 26246528496.

The previous prime is 26251722631. The next prime is 26251722689. The reversal of 26251722667 is 76622715262.

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

It is a cyclic number.

It is not a de Polignac number, because 26251722667 - 2¹⁵ = 26251689899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26251722067) 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, 2589498 + ... + 2599615.

It is an arithmetic number, because the mean of its divisors is an integer number (6564229210).

Almost surely, 2^26251722667 is an apocalyptic number.

26251722667 is a deficient number, since it is larger than the sum of its proper divisors (5194173).

26251722667 is an equidigital number, since it uses as much as digits as its factorization.

26251722667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5194172.

The product of its digits is 846720, while the sum is 46.

The spelling of 26251722667 in words is "twenty-six billion, two hundred fifty-one million, seven hundred twenty-two thousand, six hundred sixty-seven".