11109939157 has 2 divisors, whose sum is σ = 11109939158. Its totient is φ = 11109939156.

The previous prime is 11109939107. The next prime is 11109939167. The reversal of 11109939157 is 75193990111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8777628721 + 2332310436 = 93689^2 + 48294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11109939157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11109939107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554969578 + 5554969579.

It is an arithmetic number, because the mean of its divisors is an integer number (5554969579).

Almost surely, 2^11109939157 is an apocalyptic number.

It is an amenable number.

11109939157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11109939157 is an equidigital number, since it uses as much as digits as its factorization.

11109939157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 46.

The spelling of 11109939157 in words is "eleven billion, one hundred nine million, nine hundred thirty-nine thousand, one hundred fifty-seven".