118916686457 has 2 divisors, whose sum is σ = 118916686458. Its totient is φ = 118916686456.

The previous prime is 118916686453. The next prime is 118916686459. The reversal of 118916686457 is 754686619811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114615425401 + 4301261056 = 338549^2 + 65584^2 .

It is a cyclic number.

It is not a de Polignac number, because 118916686457 - 2² = 118916686453 is a prime.

Together with 118916686459, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118916686457.

It is not a weakly prime, because it can be changed into another prime (118916686453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59458343228 + 59458343229.

It is an arithmetic number, because the mean of its divisors is an integer number (59458343229).

Almost surely, 2^118916686457 is an apocalyptic number.

It is an amenable number.

118916686457 is a deficient number, since it is larger than the sum of its proper divisors (1).

118916686457 is an equidigital number, since it uses as much as digits as its factorization.

118916686457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 62.

The spelling of 118916686457 in words is "one hundred eighteen billion, nine hundred sixteen million, six hundred eighty-six thousand, four hundred fifty-seven".