118415821456 has 15 divisors (see below), whose sum is σ = 229433321001. Its totient is φ = 59207222496.

The previous prime is 118415821429. The next prime is 118415821463. The reversal of 118415821456 is 654128514811.

The square root of 118415821456 is 344116.

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

It can be written as a sum of positive squares in only one way, i.e., 68060461456 + 50355360000 = 260884^2 + 224400^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1333450 + ... + 1419478.

Almost surely, 2^118415821456 is an apocalyptic number.

118415821456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

118415821456 is the 344116-th square number.

It is an amenable number.

118415821456 is a deficient number, since it is larger than the sum of its proper divisors (111017499545).

118415821456 is an frugal number, since it uses more digits than its factorization.

118415821456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172066 (or 86031 counting only the distinct ones).

The product of its digits is 307200, while the sum is 46.

The spelling of 118415821456 in words is "one hundred eighteen billion, four hundred fifteen million, eight hundred twenty-one thousand, four hundred fifty-six".