15502791649 has 2 divisors, whose sum is σ = 15502791650. Its totient is φ = 15502791648.

The previous prime is 15502791617. The next prime is 15502791671. The reversal of 15502791649 is 94619720551.

It is a happy number.

15502791649 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., 11570874624 + 3931917025 = 107568^2 + 62705^2 .

It is a cyclic number.

It is not a de Polignac number, because 15502791649 - 2⁵ = 15502791617 is a prime.

It is not a weakly prime, because it can be changed into another prime (15502791149) 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, 7751395824 + 7751395825.

It is an arithmetic number, because the mean of its divisors is an integer number (7751395825).

Almost surely, 2^15502791649 is an apocalyptic number.

It is an amenable number.

15502791649 is a deficient number, since it is larger than the sum of its proper divisors (1).

15502791649 is an equidigital number, since it uses as much as digits as its factorization.

15502791649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 15502791649 in words is "fifteen billion, five hundred two million, seven hundred ninety-one thousand, six hundred forty-nine".