16851921148273 has 4 divisors (see below), whose sum is σ = 16852051451620. Its totient is φ = 16851790844928.

The previous prime is 16851921148259. The next prime is 16851921148303. The reversal of 16851921148273 is 37284112915861.

It is a happy number.

16851921148273 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8851916197089 + 8000004951184 = 2975217^2 + 2828428^2 .

It is a cyclic number.

It is not a de Polignac number, because 16851921148273 - 2³⁷ = 16714482194801 is a prime.

It is a super-2 number, since 2×16851921148273² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16851921148243) 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, 64957488 + ... + 65216401.

It is an arithmetic number, because the mean of its divisors is an integer number (4213012862905).

Almost surely, 2^{16851921148273} is an apocalyptic number.

It is an amenable number.

16851921148273 is a deficient number, since it is larger than the sum of its proper divisors (130303347).

16851921148273 is a wasteful number, since it uses less digits than its factorization.

16851921148273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130303346.

The product of its digits is 5806080, while the sum is 58.

The spelling of 16851921148273 in words is "sixteen trillion, eight hundred fifty-one billion, nine hundred twenty-one million, one hundred forty-eight thousand, two hundred seventy-three".