26513139539 has 4 divisors (see below), whose sum is σ = 27427385760. Its totient is φ = 25598893320.

The previous prime is 26513139517. The next prime is 26513139547. The reversal of 26513139539 is 93593131562.

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-26513139539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26513139493 and 26513139502.

It is not an unprimeable number, because it can be changed into a prime (26513159539) 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, 457123067 + ... + 457123124.

It is an arithmetic number, because the mean of its divisors is an integer number (6856846440).

Almost surely, 2^26513139539 is an apocalyptic number.

26513139539 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

26513139539 is a deficient number, since it is larger than the sum of its proper divisors (914246221).

26513139539 is an equidigital number, since it uses as much as digits as its factorization.

26513139539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914246220.

The product of its digits is 656100, while the sum is 47.

The spelling of 26513139539 in words is "twenty-six billion, five hundred thirteen million, one hundred thirty-nine thousand, five hundred thirty-nine".