26255721067 has 4 divisors (see below), whose sum is σ = 26380155976. Its totient is φ = 26131286160.

The previous prime is 26255721049. The next prime is 26255721113. The reversal of 26255721067 is 76012755262.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26255721067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26255722067) 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, 62217138 + ... + 62217559.

It is an arithmetic number, because the mean of its divisors is an integer number (6595038994).

Almost surely, 2^26255721067 is an apocalyptic number.

26255721067 is a deficient number, since it is larger than the sum of its proper divisors (124434909).

26255721067 is a wasteful number, since it uses less digits than its factorization.

26255721067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124434908.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 26255721067 in words is "twenty-six billion, two hundred fifty-five million, seven hundred twenty-one thousand, sixty-seven".