118428209956 has 81 divisors (see below), whose sum is σ = 246796510779. Its totient is φ = 49580073648.

The previous prime is 118428209927. The next prime is 118428209959. The reversal of 118428209956 is 659902824811.

The square root of 118428209956 is 344134.

It is a perfect power (a square), and thus also a powerful number.

It is a junction number, because it is equal to n+sod(n) for n = 118428209897 and 118428209906.

It is not an unprimeable number, because it can be changed into a prime (118428209959) 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 26 ways as a sum of consecutive naturals, for example, 226439911 + ... + 226440433.

Almost surely, 2^118428209956 is an apocalyptic number.

118428209956 is the 344134-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118428209956

118428209956 is an abundant number, since it is smaller than the sum of its proper divisors (128368300823).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

118428209956 is an frugal number, since it uses more digits than its factorization.

118428209956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 118428209956 in words is "one hundred eighteen billion, four hundred twenty-eight million, two hundred nine thousand, nine hundred fifty-six".