118898388991 has 4 divisors (see below), whose sum is σ = 118943964000. Its totient is φ = 118852813984.

The previous prime is 118898388953. The next prime is 118898389003. The reversal of 118898388991 is 199883898811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118898388991 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 (118898388901) 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, 22783591 + ... + 22788808.

It is an arithmetic number, because the mean of its divisors is an integer number (29735991000).

Almost surely, 2^118898388991 is an apocalyptic number.

118898388991 is a deficient number, since it is larger than the sum of its proper divisors (45575009).

118898388991 is an equidigital number, since it uses as much as digits as its factorization.

118898388991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45575008.

The product of its digits is 71663616, while the sum is 73.

The spelling of 118898388991 in words is "one hundred eighteen billion, eight hundred ninety-eight million, three hundred eighty-eight thousand, nine hundred ninety-one".