11531157699 has 16 divisors (see below), whose sum is σ = 15876761600. Its totient is φ = 7436681280.

The previous prime is 11531157679. The next prime is 11531157719. The reversal of 11531157699 is 99675113511.

It is a happy number.

11531157699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11531157679) and next prime (11531157719).

It is not a de Polignac number, because 11531157699 - 2⁵ = 11531157667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11531157629) 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 in 15 ways as a sum of consecutive naturals, for example, 244002 + ... + 287400.

It is an arithmetic number, because the mean of its divisors is an integer number (992297600).

Almost surely, 2^11531157699 is an apocalyptic number.

11531157699 is a deficient number, since it is larger than the sum of its proper divisors (4345603901).

11531157699 is a wasteful number, since it uses less digits than its factorization.

11531157699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46290.

The product of its digits is 255150, while the sum is 48.

The spelling of 11531157699 in words is "eleven billion, five hundred thirty-one million, one hundred fifty-seven thousand, six hundred ninety-nine".