16851009253 has 8 divisors (see below), whose sum is σ = 18148967928. Its totient is φ = 15553297344.

The previous prime is 16851009251. The next prime is 16851009257. The reversal of 16851009253 is 35290015861.

It can be written as a sum of positive squares in 4 ways, for example, as 983324164 + 15867685089 = 31358^2 + 125967^2 .

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

It is not a de Polignac number, because 16851009253 - 2¹ = 16851009251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16851009251) 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, 94875 + ... + 206647.

It is an arithmetic number, because the mean of its divisors is an integer number (2268620991).

Almost surely, 2^16851009253 is an apocalyptic number.

16851009253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16851009253 is a deficient number, since it is larger than the sum of its proper divisors (1297958675).

16851009253 is a wasteful number, since it uses less digits than its factorization.

16851009253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123383.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 16851009253 in words is "sixteen billion, eight hundred fifty-one million, nine thousand, two hundred fifty-three".