26516555243251 has 6 divisors (see below), whose sum is σ = 27252588187860. Its totient is φ = 25799891586696.

The previous prime is 26516555243183. The next prime is 26516555243287. The reversal of 26516555243251 is 15234255561562.

It is a happy number.

It is not a de Polignac number, because 26516555243251 - 2³³ = 26507965308659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26516555240251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9684642621 + ... + 9684645358.

It is an arithmetic number, because the mean of its divisors is an integer number (4542098031310).

Almost surely, 2^{26516555243251} is an apocalyptic number.

26516555243251 is a deficient number, since it is larger than the sum of its proper divisors (736032944609).

26516555243251 is an equidigital number, since it uses as much as digits as its factorization.

26516555243251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19369288053 (or 19369288016 counting only the distinct ones).

The product of its digits is 10800000, while the sum is 52.

The spelling of 26516555243251 in words is "twenty-six trillion, five hundred sixteen billion, five hundred fifty-five million, two hundred forty-three thousand, two hundred fifty-one".