11571996249 has 12 divisors (see below), whose sum is σ = 18234660912. Its totient is φ = 7013331000.

The previous prime is 11571996229. The next prime is 11571996257. The reversal of 11571996249 is 94269917511.

It is a happy number.

11571996249 is a `hidden beast` number, since 1 + 1 + 5 + 7 + 1 + 9 + 9 + 624 + 9 = 666.

It is not a de Polignac number, because 11571996249 - 2⁵ = 11571996217 is a prime.

It is a super-2 number, since 2×11571996249² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 11571996195 and 11571996204.

It is not an unprimeable number, because it can be changed into a prime (11571996229) 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 11 ways as a sum of consecutive naturals, for example, 58444327 + ... + 58444524.

It is an arithmetic number, because the mean of its divisors is an integer number (1519555076).

Almost surely, 2^11571996249 is an apocalyptic number.

It is an amenable number.

11571996249 is a deficient number, since it is larger than the sum of its proper divisors (6662664663).

11571996249 is a wasteful number, since it uses less digits than its factorization.

11571996249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116888868 (or 116888865 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The spelling of 11571996249 in words is "eleven billion, five hundred seventy-one million, nine hundred ninety-six thousand, two hundred forty-nine".