26616531251 has 4 divisors (see below), whose sum is σ = 26646675432. Its totient is φ = 26586387072.

The previous prime is 26616531229. The next prime is 26616531281. The reversal of 26616531251 is 15213561662.

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 26616531251 - 2³⁰ = 25542789427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26616531281) 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, 15070766 + ... + 15072531.

It is an arithmetic number, because the mean of its divisors is an integer number (6661668858).

Almost surely, 2^26616531251 is an apocalyptic number.

26616531251 is a deficient number, since it is larger than the sum of its proper divisors (30144181).

26616531251 is an equidigital number, since it uses as much as digits as its factorization.

26616531251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30144180.

The product of its digits is 64800, while the sum is 38.

The spelling of 26616531251 in words is "twenty-six billion, six hundred sixteen million, five hundred thirty-one thousand, two hundred fifty-one".