16680418253 has 8 divisors (see below), whose sum is σ = 16727533560. Its totient is φ = 16633331200.

The previous prime is 16680418243. The next prime is 16680418297. The reversal of 16680418253 is 35281408661.

It can be written as a sum of positive squares in 4 ways, for example, as 545829769 + 16134588484 = 23363^2 + 127022^2 .

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 16680418253 - 2⁶ = 16680418189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680418243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806713 + ... + 1815921.

It is an arithmetic number, because the mean of its divisors is an integer number (2090941695).

Almost surely, 2^16680418253 is an apocalyptic number.

It is an amenable number.

16680418253 is a deficient number, since it is larger than the sum of its proper divisors (47115307).

16680418253 is an equidigital number, since it uses as much as digits as its factorization.

16680418253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14127.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 16680418253 in words is "sixteen billion, six hundred eighty million, four hundred eighteen thousand, two hundred fifty-three".