16506145253 has 8 divisors (see below), whose sum is σ = 18711420000. Its totient is φ = 14434523568.

The previous prime is 16506145237. The next prime is 16506145277. The reversal of 16506145253 is 35254160561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16506145253 - 2⁴ = 16506145237 is a prime.

It is a super-2 number, since 2×16506145253² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506145283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33413003 + ... + 33413496.

It is an arithmetic number, because the mean of its divisors is an integer number (2338927500).

Almost surely, 2^16506145253 is an apocalyptic number.

16506145253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16506145253 is a deficient number, since it is larger than the sum of its proper divisors (2205274747).

16506145253 is a wasteful number, since it uses less digits than its factorization.

16506145253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66826531.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 16506145253 in words is "sixteen billion, five hundred six million, one hundred forty-five thousand, two hundred fifty-three".