15401628181 has 2 divisors, whose sum is σ = 15401628182. Its totient is φ = 15401628180.

The previous prime is 15401628173. The next prime is 15401628197. The reversal of 15401628181 is 18182610451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11933596081 + 3468032100 = 109241^2 + 58890^2 .

It is a cyclic number.

It is not a de Polignac number, because 15401628181 - 2³ = 15401628173 is a prime.

It is a super-2 number, since 2×15401628181² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15401628181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15401628581) 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, 7700814090 + 7700814091.

It is an arithmetic number, because the mean of its divisors is an integer number (7700814091).

Almost surely, 2^15401628181 is an apocalyptic number.

It is an amenable number.

15401628181 is a deficient number, since it is larger than the sum of its proper divisors (1).

15401628181 is an equidigital number, since it uses as much as digits as its factorization.

15401628181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 37.

The spelling of 15401628181 in words is "fifteen billion, four hundred one million, six hundred twenty-eight thousand, one hundred eighty-one".