16591601811841 has 27 divisors (see below), whose sum is σ = 19351682468001. Its totient is φ = 14183711443944.

The previous prime is 16591601811809. The next prime is 16591601811847. The reversal of 16591601811841 is 14811810619561.

The square root of 16591601811841 is 4073279.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 16591601811841 - 2⁵ = 16591601811809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16591601811847) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18790035586 + ... + 18790036468.

Almost surely, 2^{16591601811841} is an apocalyptic number.

16591601811841 is the 4073279-th square number.

16591601811841 is the 2036640-th centered octagonal number.

It is an amenable number.

16591601811841 is a deficient number, since it is larger than the sum of its proper divisors (2760080656160).

16591601811841 is an frugal number, since it uses more digits than its factorization.

16591601811841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098 (or 1549 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 52.

The spelling of 16591601811841 in words is "sixteen trillion, five hundred ninety-one billion, six hundred one million, eight hundred eleven thousand, eight hundred forty-one".