118640428642 has 4 divisors (see below), whose sum is σ = 177960642966. Its totient is φ = 59320214320.

The previous prime is 118640428619. The next prime is 118640428667. The reversal of 118640428642 is 246824046811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246824046811 = 53 ⋅4657057487.

It can be written as a sum of positive squares in only one way, i.e., 62604543681 + 56035884961 = 250209^2 + 236719^2 .

It is a junction number, because it is equal to n+sod(n) for n = 118640428592 and 118640428601.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 29660107159 + ... + 29660107162.

Almost surely, 2^118640428642 is an apocalyptic number.

118640428642 is a deficient number, since it is larger than the sum of its proper divisors (59320214324).

118640428642 is an equidigital number, since it uses as much as digits as its factorization.

118640428642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59320214323.

The product of its (nonzero) digits is 589824, while the sum is 46.

The spelling of 118640428642 in words is "one hundred eighteen billion, six hundred forty million, four hundred twenty-eight thousand, six hundred forty-two".