15912218149 has 2 divisors, whose sum is σ = 15912218150. Its totient is φ = 15912218148.

The previous prime is 15912218137. The next prime is 15912218159. The reversal of 15912218149 is 94181221951.

15912218149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12036284100 + 3875934049 = 109710^2 + 62257^2 .

It is a cyclic number.

It is not a de Polignac number, because 15912218149 - 2⁹ = 15912217637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15912218159) 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 as a sum of consecutive naturals, namely, 7956109074 + 7956109075.

It is an arithmetic number, because the mean of its divisors is an integer number (7956109075).

Almost surely, 2^15912218149 is an apocalyptic number.

It is an amenable number.

15912218149 is a deficient number, since it is larger than the sum of its proper divisors (1).

15912218149 is an equidigital number, since it uses as much as digits as its factorization.

15912218149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 43.

The spelling of 15912218149 in words is "fifteen billion, nine hundred twelve million, two hundred eighteen thousand, one hundred forty-nine".