15627728449 has 2 divisors, whose sum is σ = 15627728450. Its totient is φ = 15627728448.

The previous prime is 15627728393. The next prime is 15627728461. The reversal of 15627728449 is 94482772651.

15627728449 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., 15560816049 + 66912400 = 124743^2 + 8180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15627728449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15627728449.

It is not a weakly prime, because it can be changed into another prime (15627728549) 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, 7813864224 + 7813864225.

It is an arithmetic number, because the mean of its divisors is an integer number (7813864225).

Almost surely, 2^15627728449 is an apocalyptic number.

It is an amenable number.

15627728449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15627728449 is an equidigital number, since it uses as much as digits as its factorization.

15627728449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 55.

The spelling of 15627728449 in words is "fifteen billion, six hundred twenty-seven million, seven hundred twenty-eight thousand, four hundred forty-nine".