16325611651665 has 64 divisors (see below), whose sum is σ = 29373995692800. Its totient is φ = 8602247526912.

The previous prime is 16325611651663. The next prime is 16325611651711. The reversal of 16325611651665 is 56615611652361.

16325611651665 is a `hidden beast` number, since 1 + 6 + 3 + 2 + 5 + 6 + 116 + 516 + 6 + 5 = 666.

It is not a de Polignac number, because 16325611651665 - 2¹ = 16325611651663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16325611651663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3507469 + ... + 6704741.

It is an arithmetic number, because the mean of its divisors is an integer number (458968682700).

Almost surely, 2^{16325611651665} is an apocalyptic number.

16325611651665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16325611651665 is a deficient number, since it is larger than the sum of its proper divisors (13048384041135).

16325611651665 is a wasteful number, since it uses less digits than its factorization.

16325611651665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197743 (or 3197737 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The spelling of 16325611651665 in words is "sixteen trillion, three hundred twenty-five billion, six hundred eleven million, six hundred fifty-one thousand, six hundred sixty-five".