16194853081 has 27 divisors (see below), whose sum is σ = 18645627637. Its totient is φ = 14054483960.

The previous prime is 16194853079. The next prime is 16194853093. The reversal of 16194853081 is 18035849161.

The square root of 16194853081 is 127259.

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

It is not a de Polignac number, because 16194853081 - 2¹ = 16194853079 is a prime.

It is a super-2 number, since 2×16194853081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16194853001) 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, 32196276 + ... + 32196778.

Almost surely, 2^16194853081 is an apocalyptic number.

16194853081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16194853081 is the 127259-th square number.

16194853081 is the 63630-th centered octagonal number.

It is an amenable number.

16194853081 is a deficient number, since it is larger than the sum of its proper divisors (2450774556).

16194853081 is an frugal number, since it uses more digits than its factorization.

16194853081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 16194853081 in words is "sixteen billion, one hundred ninety-four million, eight hundred fifty-three thousand, eighty-one".