16692381601 has 9 divisors (see below), whose sum is σ = 19418720499. Its totient is φ = 14306980464.

The previous prime is 16692381577. The next prime is 16692381611. The reversal of 16692381601 is 10618329661.

The square root of 16692381601 is 129199.

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

It can be written as a sum of positive squares in only one way, i.e., 12333213025 + 4359168576 = 111055^2 + 66024^2 .

It is not a de Polignac number, because 16692381601 - 2⁵ = 16692381569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16692381611) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 895165 + ... + 913621.

It is an arithmetic number, because the mean of its divisors is an integer number (2157635611).

Almost surely, 2^16692381601 is an apocalyptic number.

16692381601 is the 129199-th square number.

16692381601 is the 64600-th centered octagonal number.

It is an amenable number.

16692381601 is a deficient number, since it is larger than the sum of its proper divisors (2726338898).

16692381601 is an frugal number, since it uses more digits than its factorization.

16692381601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36928 (or 18464 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 16692381601 in words is "sixteen billion, six hundred ninety-two million, three hundred eighty-one thousand, six hundred one".