118131557945 has 4 divisors (see below), whose sum is σ = 141757869540. Its totient is φ = 94505246352.

The previous prime is 118131557891. The next prime is 118131557959. The reversal of 118131557945 is 549755131811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549755131811 = 773 ⋅711196807.

It can be written as a sum of positive squares in 2 ways, for example, as 79327285801 + 38804272144 = 281651^2 + 196988^2 .

It is a cyclic number.

It is not a de Polignac number, because 118131557945 - 2¹² = 118131553849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118131557893 and 118131557902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11813155790 + ... + 11813155799.

It is an arithmetic number, because the mean of its divisors is an integer number (35439467385).

Almost surely, 2^118131557945 is an apocalyptic number.

It is an amenable number.

118131557945 is a deficient number, since it is larger than the sum of its proper divisors (23626311595).

118131557945 is an equidigital number, since it uses as much as digits as its factorization.

118131557945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23626311594.

The product of its digits is 756000, while the sum is 50.

The spelling of 118131557945 in words is "one hundred eighteen billion, one hundred thirty-one million, five hundred fifty-seven thousand, nine hundred forty-five".