118641645 has 32 divisors (see below), whose sum is σ = 214391040. Its totient is φ = 62233920.

The previous prime is 118641641. The next prime is 118641671. The reversal of 118641645 is 546146811.

118641645 is a `hidden beast` number, since 1 + 1 + 8 + 6 + 4 + 1 + 645 = 666.

It is not a de Polignac number, because 118641645 - 2² = 118641641 is a prime.

It is a super-3 number, since 3×118641645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118641641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1032 + ... + 15438.

It is an arithmetic number, because the mean of its divisors is an integer number (6699720).

Almost surely, 2^118641645 is an apocalyptic number.

118641645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118641645 is a deficient number, since it is larger than the sum of its proper divisors (95749395).

118641645 is a wasteful number, since it uses less digits than its factorization.

118641645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14482 (or 14476 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 118641645 is about 10892.2745558492. The cubic root of 118641645 is about 491.3742416365.

The spelling of 118641645 in words is "one hundred eighteen million, six hundred forty-one thousand, six hundred forty-five".