15401632481 has 2 divisors, whose sum is σ = 15401632482. Its totient is φ = 15401632480.

The previous prime is 15401632459. The next prime is 15401632507. The reversal of 15401632481 is 18423610451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10535174881 + 4866457600 = 102641^2 + 69760^2 .

It is a cyclic number.

It is not a de Polignac number, because 15401632481 - 2³⁰ = 14327890657 is a prime.

It is a super-2 number, since 2×15401632481² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15401632451) 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 as a sum of consecutive naturals, namely, 7700816240 + 7700816241.

It is an arithmetic number, because the mean of its divisors is an integer number (7700816241).

Almost surely, 2^15401632481 is an apocalyptic number.

It is an amenable number.

15401632481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15401632481 is an equidigital number, since it uses as much as digits as its factorization.

15401632481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 15401632481 in words is "fifteen billion, four hundred one million, six hundred thirty-two thousand, four hundred eighty-one".