26245172779 has 6 divisors (see below), whose sum is σ = 30530099004. Its totient is φ = 22495862340.

The previous prime is 26245172761. The next prime is 26245172797. The reversal of 26245172779 is 97727154262.

It is an interprime number because it is at equal distance from previous prime (26245172761) and next prime (26245172797).

It is not a de Polignac number, because 26245172779 - 2⁷ = 26245172651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26245172279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 267807837 + ... + 267807934.

It is an arithmetic number, because the mean of its divisors is an integer number (5088349834).

Almost surely, 2^26245172779 is an apocalyptic number.

26245172779 is a deficient number, since it is larger than the sum of its proper divisors (4284926225).

26245172779 is an equidigital number, since it uses as much as digits as its factorization.

26245172779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535615785 (or 535615778 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 52.

The spelling of 26245172779 in words is "twenty-six billion, two hundred forty-five million, one hundred seventy-two thousand, seven hundred seventy-nine".