26552978247 has 4 divisors (see below), whose sum is σ = 35403971000. Its totient is φ = 17701985496.

The previous prime is 26552978237. The next prime is 26552978251. The reversal of 26552978247 is 74287925562.

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

It is not a de Polignac number, because 26552978247 - 2⁸ = 26552977991 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 (26552978237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4425496372 + ... + 4425496377.

It is an arithmetic number, because the mean of its divisors is an integer number (8850992750).

Almost surely, 2^26552978247 is an apocalyptic number.

26552978247 is a deficient number, since it is larger than the sum of its proper divisors (8850992753).

26552978247 is an equidigital number, since it uses as much as digits as its factorization.

26552978247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8850992752.

The product of its digits is 16934400, while the sum is 57.

The spelling of 26552978247 in words is "twenty-six billion, five hundred fifty-two million, nine hundred seventy-eight thousand, two hundred forty-seven".