16253521311 has 4 divisors (see below), whose sum is σ = 21671361752. Its totient is φ = 10835680872.

The previous prime is 16253521261. The next prime is 16253521327. The reversal of 16253521311 is 11312535261.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16253521311 - 2⁹ = 16253520799 is a prime.

It is a super-3 number, since 3×16253521311³ (a number of 32 digits) contains 333 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 (16253521331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2708920216 + ... + 2708920221.

It is an arithmetic number, because the mean of its divisors is an integer number (5417840438).

Almost surely, 2^16253521311 is an apocalyptic number.

16253521311 is a deficient number, since it is larger than the sum of its proper divisors (5417840441).

16253521311 is an equidigital number, since it uses as much as digits as its factorization.

16253521311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5417840440.

The product of its digits is 5400, while the sum is 30.

The spelling of 16253521311 in words is "sixteen billion, two hundred fifty-three million, five hundred twenty-one thousand, three hundred eleven".