118771242157 has 2 divisors, whose sum is σ = 118771242158. Its totient is φ = 118771242156.

The previous prime is 118771242131. The next prime is 118771242167. The reversal of 118771242157 is 751242177811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117086468041 + 1684774116 = 342179^2 + 41046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118771242157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118771242167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59385621078 + 59385621079.

It is an arithmetic number, because the mean of its divisors is an integer number (59385621079).

Almost surely, 2^118771242157 is an apocalyptic number.

It is an amenable number.

118771242157 is a deficient number, since it is larger than the sum of its proper divisors (1).

118771242157 is an equidigital number, since it uses as much as digits as its factorization.

118771242157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 219520, while the sum is 46.

The spelling of 118771242157 in words is "one hundred eighteen billion, seven hundred seventy-one million, two hundred forty-two thousand, one hundred fifty-seven".