11191180157 has 4 divisors (see below), whose sum is σ = 11201438976. Its totient is φ = 11180921340.

The previous prime is 11191180153. The next prime is 11191180159. The reversal of 11191180157 is 75108119111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11191180157 - 2² = 11191180153 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 (11191180153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5127773 + ... + 5129954.

It is an arithmetic number, because the mean of its divisors is an integer number (2800359744).

Almost surely, 2^11191180157 is an apocalyptic number.

It is an amenable number.

11191180157 is a deficient number, since it is larger than the sum of its proper divisors (10258819).

11191180157 is a wasteful number, since it uses less digits than its factorization.

11191180157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258818.

The product of its (nonzero) digits is 2520, while the sum is 35.

Adding to 11191180157 its reverse (75108119111), we get a palindrome (86299299268).

The spelling of 11191180157 in words is "eleven billion, one hundred ninety-one million, one hundred eighty thousand, one hundred fifty-seven".