26451293669 has 4 divisors (see below), whose sum is σ = 27843467040. Its totient is φ = 25059120300.

The previous prime is 26451293663. The next prime is 26451293723. The reversal of 26451293669 is 96639215462.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 26451293669 - 2²⁸ = 26182858213 is a prime.

It is a super-2 number, since 2×26451293669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26451293669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26451293663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696086657 + ... + 696086694.

It is an arithmetic number, because the mean of its divisors is an integer number (6960866760).

Almost surely, 2^26451293669 is an apocalyptic number.

It is an amenable number.

26451293669 is a deficient number, since it is larger than the sum of its proper divisors (1392173371).

26451293669 is a wasteful number, since it uses less digits than its factorization.

26451293669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392173370.

The product of its digits is 4199040, while the sum is 53.

The spelling of 26451293669 in words is "twenty-six billion, four hundred fifty-one million, two hundred ninety-three thousand, six hundred sixty-nine".