15186918349 has 2 divisors, whose sum is σ = 15186918350. Its totient is φ = 15186918348.

The previous prime is 15186918293. The next prime is 15186918353. The reversal of 15186918349 is 94381968151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12840969124 + 2345949225 = 113318^2 + 48435^2 .

It is a cyclic number.

It is not a de Polignac number, because 15186918349 - 2⁷ = 15186918221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15186918349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15186918049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7593459174 + 7593459175.

It is an arithmetic number, because the mean of its divisors is an integer number (7593459175).

Almost surely, 2^15186918349 is an apocalyptic number.

It is an amenable number.

15186918349 is a deficient number, since it is larger than the sum of its proper divisors (1).

15186918349 is an equidigital number, since it uses as much as digits as its factorization.

15186918349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 55.

The spelling of 15186918349 in words is "fifteen billion, one hundred eighty-six million, nine hundred eighteen thousand, three hundred forty-nine".