26253723493 has 4 divisors (see below), whose sum is σ = 26454133728. Its totient is φ = 26053313260.

The previous prime is 26253723439. The next prime is 26253723539. The reversal of 26253723493 is 39432735262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39432735262 = 2 ⋅19716367631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26253723493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26253723413) 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, 100204921 + ... + 100205182.

It is an arithmetic number, because the mean of its divisors is an integer number (6613533432).

Almost surely, 2^26253723493 is an apocalyptic number.

It is an amenable number.

26253723493 is a deficient number, since it is larger than the sum of its proper divisors (200410235).

26253723493 is a wasteful number, since it uses less digits than its factorization.

26253723493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200410234.

The product of its digits is 1632960, while the sum is 46.

The spelling of 26253723493 in words is "twenty-six billion, two hundred fifty-three million, seven hundred twenty-three thousand, four hundred ninety-three".