16516425253 has 4 divisors (see below), whose sum is σ = 16516702540. Its totient is φ = 16516147968.

The previous prime is 16516425181. The next prime is 16516425307. The reversal of 16516425253 is 35252461561.

16516425253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35252461561 = 181 ⋅194764981.

It can be written as a sum of positive squares in 2 ways, for example, as 3033035329 + 13483389924 = 55073^2 + 116118^2 .

It is a cyclic number.

It is not a de Polignac number, because 16516425253 - 2²⁵ = 16482870821 is a prime.

It is a super-2 number, since 2×16516425253² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16516425553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8700 + ... + 181957.

It is an arithmetic number, because the mean of its divisors is an integer number (4129175635).

Almost surely, 2^16516425253 is an apocalyptic number.

It is an amenable number.

16516425253 is a deficient number, since it is larger than the sum of its proper divisors (277287).

16516425253 is an equidigital number, since it uses as much as digits as its factorization.

16516425253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277286.

The product of its digits is 216000, while the sum is 40.

The spelling of 16516425253 in words is "sixteen billion, five hundred sixteen million, four hundred twenty-five thousand, two hundred fifty-three".