26864888721 has 16 divisors (see below), whose sum is σ = 39434704320. Its totient is φ = 16132374720.

The previous prime is 26864888693. The next prime is 26864888761. The reversal of 26864888721 is 12788846862.

It is not a de Polignac number, because 26864888721 - 2⁵ = 26864888689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26864888761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3730750 + ... + 3737943.

It is an arithmetic number, because the mean of its divisors is an integer number (2464669020).

Almost surely, 2^26864888721 is an apocalyptic number.

It is an amenable number.

26864888721 is a deficient number, since it is larger than the sum of its proper divisors (12569815599).

26864888721 is a wasteful number, since it uses less digits than its factorization.

26864888721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7468816.

The product of its digits is 16515072, while the sum is 60.

The spelling of 26864888721 in words is "twenty-six billion, eight hundred sixty-four million, eight hundred eighty-eight thousand, seven hundred twenty-one".