26691617039 has 4 divisors (see below), whose sum is σ = 26950759056. Its totient is φ = 26432475024.

The previous prime is 26691616949. The next prime is 26691617053. The reversal of 26691617039 is 93071619662.

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

It is a cyclic number.

It is not a de Polignac number, because 26691617039 - 2²⁴ = 26674839823 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 (26691617539) 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, 129570854 + ... + 129571059.

It is an arithmetic number, because the mean of its divisors is an integer number (6737689764).

Almost surely, 2^26691617039 is an apocalyptic number.

26691617039 is a deficient number, since it is larger than the sum of its proper divisors (259142017).

26691617039 is a wasteful number, since it uses less digits than its factorization.

26691617039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259142016.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 26691617039 in words is "twenty-six billion, six hundred ninety-one million, six hundred seventeen thousand, thirty-nine".