26489436997 has 4 divisors (see below), whose sum is σ = 26496298080. Its totient is φ = 26482575916.

The previous prime is 26489436893. The next prime is 26489437001. The reversal of 26489436997 is 79963498462.

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 26489436997 - 2²⁷ = 26355219269 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 (26489439997) 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, 3424747 + ... + 3432472.

It is an arithmetic number, because the mean of its divisors is an integer number (6624074520).

Almost surely, 2^26489436997 is an apocalyptic number.

It is an amenable number.

26489436997 is a deficient number, since it is larger than the sum of its proper divisors (6861083).

26489436997 is an equidigital number, since it uses as much as digits as its factorization.

26489436997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861082.

The product of its digits is 141087744, while the sum is 67.

The spelling of 26489436997 in words is "twenty-six billion, four hundred eighty-nine million, four hundred thirty-six thousand, nine hundred ninety-seven".