26172472621 has 12 divisors (see below), whose sum is σ = 29265892480. Its totient is φ = 23336441280.

The previous prime is 26172472619. The next prime is 26172472643. The reversal of 26172472621 is 12627427162.

It is not a de Polignac number, because 26172472621 - 2¹ = 26172472619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26172472691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2377725 + ... + 2388706.

Almost surely, 2^26172472621 is an apocalyptic number.

It is an amenable number.

26172472621 is a deficient number, since it is larger than the sum of its proper divisors (3093419859).

26172472621 is a wasteful number, since it uses less digits than its factorization.

26172472621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766484 (or 4766467 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

Adding to 26172472621 its reverse (12627427162), we get a palindrome (38799899783).

The spelling of 26172472621 in words is "twenty-six billion, one hundred seventy-two million, four hundred seventy-two thousand, six hundred twenty-one".