11551511049 has 16 divisors (see below), whose sum is σ = 16633008000. Its totient is φ = 7088812416.

The previous prime is 11551511047. The next prime is 11551511087. The reversal of 11551511049 is 94011515511.

It is not a de Polignac number, because 11551511049 - 2¹ = 11551511047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11551511047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398524 + ... + 426525.

It is an arithmetic number, because the mean of its divisors is an integer number (1039563000).

Almost surely, 2^11551511049 is an apocalyptic number.

It is an amenable number.

11551511049 is a deficient number, since it is larger than the sum of its proper divisors (5081496951).

11551511049 is a wasteful number, since it uses less digits than its factorization.

11551511049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825424.

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 11551511049 in words is "eleven billion, five hundred fifty-one million, five hundred eleven thousand, forty-nine".