118399535857 has 4 divisors (see below), whose sum is σ = 118400284836. Its totient is φ = 118398786880.

The previous prime is 118399535803. The next prime is 118399535921. The reversal of 118399535857 is 758535993811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 758535993811 = 3527 ⋅215065493.

It can be written as a sum of positive squares in 2 ways, for example, as 112858371136 + 5541164721 = 335944^2 + 74439^2 .

It is a cyclic number.

It is not a de Polignac number, because 118399535857 - 2¹⁹ = 118399011569 is a prime.

It is a super-3 number, since 3×118399535857³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118399505857) 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, 34444 + ... + 487837.

It is an arithmetic number, because the mean of its divisors is an integer number (29600071209).

Almost surely, 2^118399535857 is an apocalyptic number.

It is an amenable number.

118399535857 is a deficient number, since it is larger than the sum of its proper divisors (748979).

118399535857 is an equidigital number, since it uses as much as digits as its factorization.

118399535857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748978.

The product of its digits is 40824000, while the sum is 64.

The spelling of 118399535857 in words is "one hundred eighteen billion, three hundred ninety-nine million, five hundred thirty-five thousand, eight hundred fifty-seven".