118450520813 has 4 divisors (see below), whose sum is σ = 121339557948. Its totient is φ = 115561483680.

The previous prime is 118450520801. The next prime is 118450520821. The reversal of 118450520813 is 318025054811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318025054811 = 84713 ⋅3754147.

It can be written as a sum of positive squares in 2 ways, for example, as 2521847524 + 115928673289 = 50218^2 + 340483^2 .

It is a cyclic number.

It is not a de Polignac number, because 118450520813 - 2¹⁸ = 118450258669 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 (118450520843) 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, 1444518506 + ... + 1444518587.

It is an arithmetic number, because the mean of its divisors is an integer number (30334889487).

Almost surely, 2^118450520813 is an apocalyptic number.

It is an amenable number.

118450520813 is a deficient number, since it is larger than the sum of its proper divisors (2889037135).

118450520813 is an equidigital number, since it uses as much as digits as its factorization.

118450520813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889037134.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 118450520813 in words is "one hundred eighteen billion, four hundred fifty million, five hundred twenty thousand, eight hundred thirteen".