26139593489 has 4 divisors (see below), whose sum is σ = 26747491056. Its totient is φ = 25531695924.

The previous prime is 26139593471. The next prime is 26139593507. The reversal of 26139593489 is 98439593162.

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: 98439593162 = 2 ⋅49219796581.

It is an interprime number because it is at equal distance from previous prime (26139593471) and next prime (26139593507).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26139593489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26139593429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303948719 + ... + 303948804.

It is an arithmetic number, because the mean of its divisors is an integer number (6686872764).

Almost surely, 2^26139593489 is an apocalyptic number.

It is an amenable number.

26139593489 is a deficient number, since it is larger than the sum of its proper divisors (607897567).

26139593489 is an equidigital number, since it uses as much as digits as its factorization.

26139593489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607897566.

The product of its digits is 12597120, while the sum is 59.

The spelling of 26139593489 in words is "twenty-six billion, one hundred thirty-nine million, five hundred ninety-three thousand, four hundred eighty-nine".