11551040399 has 16 divisors (see below), whose sum is σ = 11862789120. Its totient is φ = 11242241760.

The previous prime is 11551040377. The next prime is 11551040429. The reversal of 11551040399 is 99304015511.

It is a cyclic number.

It is not a de Polignac number, because 11551040399 - 2¹² = 11551036303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551049399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9398117 + ... + 9399345.

It is an arithmetic number, because the mean of its divisors is an integer number (741424320).

Almost surely, 2^11551040399 is an apocalyptic number.

11551040399 is a deficient number, since it is larger than the sum of its proper divisors (311748721).

11551040399 is a wasteful number, since it uses less digits than its factorization.

11551040399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 24300, while the sum is 38.

The spelling of 11551040399 in words is "eleven billion, five hundred fifty-one million, forty thousand, three hundred ninety-nine".