65481918 has 16 divisors (see below), whose sum is σ = 132124176. Its totient is φ = 21633920.

The previous prime is 65481883. The next prime is 65481929. The reversal of 65481918 is 81918456.

It is a self number, because there is not a number n which added to its sum of digits gives 65481918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47613 + ... + 48968.

It is an arithmetic number, because the mean of its divisors is an integer number (8257761).

Almost surely, 2^65481918 is an apocalyptic number.

65481918 is an abundant number, since it is smaller than the sum of its proper divisors (66642258).

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

65481918 is a wasteful number, since it uses less digits than its factorization.

65481918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96699.

The product of its digits is 69120, while the sum is 42.

The square root of 65481918 is about 8092.0898413203. The cubic root of 65481918 is about 403.0638020435.

The spelling of 65481918 in words is "sixty-five million, four hundred eighty-one thousand, nine hundred eighteen".