16781662253 has 4 divisors (see below), whose sum is σ = 16786614528. Its totient is φ = 16776709980.

The previous prime is 16781662241. The next prime is 16781662273. The reversal of 16781662253 is 35226618761.

16781662253 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16781662253 - 2⁶ = 16781662189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16781662198 and 16781662207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16781662213) 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, 2471051 + ... + 2477832.

It is an arithmetic number, because the mean of its divisors is an integer number (4196653632).

Almost surely, 2^16781662253 is an apocalyptic number.

It is an amenable number.

16781662253 is a deficient number, since it is larger than the sum of its proper divisors (4952275).

16781662253 is an equidigital number, since it uses as much as digits as its factorization.

16781662253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952274.

The product of its digits is 725760, while the sum is 47.

The spelling of 16781662253 in words is "sixteen billion, seven hundred eighty-one million, six hundred sixty-two thousand, two hundred fifty-three".