16605614765 has 16 divisors (see below), whose sum is σ = 19991944368. Its totient is φ = 13241074176.

The previous prime is 16605614761. The next prime is 16605614801. The reversal of 16605614765 is 56741650661.

It can be written as a sum of positive squares in 8 ways, for example, as 1114825321 + 15490789444 = 33389^2 + 124462^2 .

It is a cyclic number.

It is not a de Polignac number, because 16605614765 - 2² = 16605614761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605614761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3795119 + ... + 3799491.

It is an arithmetic number, because the mean of its divisors is an integer number (1249496523).

Almost surely, 2^16605614765 is an apocalyptic number.

It is an amenable number.

16605614765 is a deficient number, since it is larger than the sum of its proper divisors (3386329603).

16605614765 is a wasteful number, since it uses less digits than its factorization.

16605614765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6688.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 16605614765 in words is "sixteen billion, six hundred five million, six hundred fourteen thousand, seven hundred sixty-five".