65440318986 has 64 divisors (see below), whose sum is σ = 169589472000. Its totient is φ = 18697228704.

The previous prime is 65440318973. The next prime is 65440318997. The reversal of 65440318986 is 68981304456.

65440318986 is a `hidden beast` number, since 6 + 54 + 403 + 189 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1748035 + ... + 1785078.

It is an arithmetic number, because the mean of its divisors is an integer number (2649835500).

Almost surely, 2^65440318986 is an apocalyptic number.

65440318986 is an abundant number, since it is smaller than the sum of its proper divisors (104149153014).

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

65440318986 is a wasteful number, since it uses less digits than its factorization.

65440318986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533145 (or 3533125 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 65440318986 in words is "sixty-five billion, four hundred forty million, three hundred eighteen thousand, nine hundred eighty-six".