26721388321151 has 4 divisors (see below), whose sum is σ = 26721893876904. Its totient is φ = 26720882765400.

The previous prime is 26721388321087. The next prime is 26721388321163. The reversal of 26721388321151 is 15112388312762.

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

It is a cyclic number.

It is not a de Polignac number, because 26721388321151 - 2⁶ = 26721388321087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26721388321151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26721388321951) 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, 252698585 + ... + 252804306.

It is an arithmetic number, because the mean of its divisors is an integer number (6680473469226).

Almost surely, 2^{26721388321151} is an apocalyptic number.

26721388321151 is a deficient number, since it is larger than the sum of its proper divisors (505555753).

26721388321151 is an equidigital number, since it uses as much as digits as its factorization.

26721388321151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505555752.

The product of its digits is 967680, while the sum is 50.

The spelling of 26721388321151 in words is "twenty-six trillion, seven hundred twenty-one billion, three hundred eighty-eight million, three hundred twenty-one thousand, one hundred fifty-one".