26501460421 has 4 divisors (see below), whose sum is σ = 26501816844. Its totient is φ = 26501104000.

The previous prime is 26501460413. The next prime is 26501460437. The reversal of 26501460421 is 12406410562.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6199200225 + 20302260196 = 78735^2 + 142486^2 .

It is a cyclic number.

It is not a de Polignac number, because 26501460421 - 2³ = 26501460413 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26501460221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19660 + ... + 231061.

It is an arithmetic number, because the mean of its divisors is an integer number (6625454211).

Almost surely, 2^26501460421 is an apocalyptic number.

It is an amenable number.

26501460421 is a deficient number, since it is larger than the sum of its proper divisors (356423).

26501460421 is a wasteful number, since it uses less digits than its factorization.

26501460421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356422.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 26501460421 its reverse (12406410562), we get a palindrome (38907870983).

The spelling of 26501460421 in words is "twenty-six billion, five hundred one million, four hundred sixty thousand, four hundred twenty-one".