15115550049 has 20 divisors (see below), whose sum is σ = 22833738180. Its totient is φ = 9963803520.

The previous prime is 15115550003. The next prime is 15115550057. The reversal of 15115550049 is 94005551151.

15115550049 is a `hidden beast` number, since 1 + 51 + 15 + 550 + 0 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3014010000 + 12101540049 = 54900^2 + 110007^2 .

It is not a de Polignac number, because 15115550049 - 2¹⁵ = 15115517281 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15115549995 and 15115550022.

It is not an unprimeable number, because it can be changed into a prime (15115550069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1041172 + ... + 1055589.

It is an arithmetic number, because the mean of its divisors is an integer number (1141686909).

Almost surely, 2^15115550049 is an apocalyptic number.

It is an amenable number.

15115550049 is a deficient number, since it is larger than the sum of its proper divisors (7718188131).

15115550049 is an equidigital number, since it uses as much as digits as its factorization.

15115550049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096862 (or 2096853 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 15115550049 in words is "fifteen billion, one hundred fifteen million, five hundred fifty thousand, forty-nine".