118181816 has 8 divisors (see below), whose sum is σ = 221590920. Its totient is φ = 59090904.

The previous prime is 118181783. The next prime is 118181849. The reversal of 118181816 is 618181811.

It is an interprime number because it is at equal distance from previous prime (118181783) and next prime (118181849).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7386356 + ... + 7386371.

It is an arithmetic number, because the mean of its divisors is an integer number (27698865).

Almost surely, 2^118181816 is an apocalyptic number.

It is an amenable number.

118181816 is a deficient number, since it is larger than the sum of its proper divisors (103409104).

118181816 is a wasteful number, since it uses less digits than its factorization.

118181816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14772733 (or 14772729 counting only the distinct ones).

The product of its digits is 3072, while the sum is 35.

The square root of 118181816 is about 10871.1460297431. The cubic root of 118181816 is about 490.7386001218.

The spelling of 118181816 in words is "one hundred eighteen million, one hundred eighty-one thousand, eight hundred sixteen".