118531961351 has 36 divisors (see below), whose sum is σ = 129084460848. Its totient is φ = 108622660608.

The previous prime is 118531961333. The next prime is 118531961369. The reversal of 118531961351 is 153169135811.

It is an interprime number because it is at equal distance from previous prime (118531961333) and next prime (118531961369).

It is not a de Polignac number, because 118531961351 - 2³⁴ = 101352092167 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 (118531961311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 601684985 + ... + 601685181.

It is an arithmetic number, because the mean of its divisors is an integer number (3585679468).

Almost surely, 2^118531961351 is an apocalyptic number.

118531961351 is a deficient number, since it is larger than the sum of its proper divisors (10552499497).

118531961351 is an frugal number, since it uses more digits than its factorization.

118531961351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 354 counting only the distinct ones).

The product of its digits is 97200, while the sum is 44.

The spelling of 118531961351 in words is "one hundred eighteen billion, five hundred thirty-one million, nine hundred sixty-one thousand, three hundred fifty-one".