118197394149 has 4 divisors (see below), whose sum is σ = 157596525536. Its totient is φ = 78798262764.

The previous prime is 118197394127. The next prime is 118197394169. The reversal of 118197394149 is 941493791811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-118197394149 is a prime.

It is a super-2 number, since 2×118197394149² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118197394169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19699565689 + ... + 19699565694.

It is an arithmetic number, because the mean of its divisors is an integer number (39399131384).

Almost surely, 2^118197394149 is an apocalyptic number.

It is an amenable number.

118197394149 is a deficient number, since it is larger than the sum of its proper divisors (39399131387).

118197394149 is an equidigital number, since it uses as much as digits as its factorization.

118197394149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39399131386.

The product of its digits is 1959552, while the sum is 57.

The spelling of 118197394149 in words is "one hundred eighteen billion, one hundred ninety-seven million, three hundred ninety-four thousand, one hundred forty-nine".