16418752065 has 48 divisors (see below), whose sum is σ = 30230568576. Its totient is φ = 8214950400.

The previous prime is 16418752037. The next prime is 16418752073. The reversal of 16418752065 is 56025781461.

16418752065 is a `hidden beast` number, since 1 + 6 + 41 + 87 + 520 + 6 + 5 = 666.

It is not a de Polignac number, because 16418752065 - 2⁵ = 16418752033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16418752065.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203410 + ... + 272420.

It is an arithmetic number, because the mean of its divisors is an integer number (629803512).

Almost surely, 2^16418752065 is an apocalyptic number.

16418752065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16418752065 is a deficient number, since it is larger than the sum of its proper divisors (13811816511).

16418752065 is a wasteful number, since it uses less digits than its factorization.

16418752065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69350 (or 69347 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 16418752065 in words is "sixteen billion, four hundred eighteen million, seven hundred fifty-two thousand, sixty-five".