26045645243 has 4 divisors (see below), whose sum is σ = 27577742040. Its totient is φ = 24513548448.

The previous prime is 26045645221. The next prime is 26045645309. The reversal of 26045645243 is 34254654062.

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-26045645243 is a prime.

It is a super-2 number, since 2×26045645243² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26045645243.

It is not an unprimeable number, because it can be changed into a prime (26045645203) 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, 766048373 + ... + 766048406.

It is an arithmetic number, because the mean of its divisors is an integer number (6894435510).

Almost surely, 2^26045645243 is an apocalyptic number.

26045645243 is a deficient number, since it is larger than the sum of its proper divisors (1532096797).

26045645243 is a wasteful number, since it uses less digits than its factorization.

26045645243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532096796.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 26045645243 in words is "twenty-six billion, forty-five million, six hundred forty-five thousand, two hundred forty-three".