16850781433 has 4 divisors (see below), whose sum is σ = 17583424128. Its totient is φ = 16118138740.

The previous prime is 16850781419. The next prime is 16850781439. The reversal of 16850781433 is 33418705861.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33418705861 = 449 ⋅74429189.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16850781433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16850781439) 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, 366321313 + ... + 366321358.

It is an arithmetic number, because the mean of its divisors is an integer number (4395856032).

Almost surely, 2^16850781433 is an apocalyptic number.

It is an amenable number.

16850781433 is a deficient number, since it is larger than the sum of its proper divisors (732642695).

16850781433 is an equidigital number, since it uses as much as digits as its factorization.

16850781433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732642694.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 16850781433 in words is "sixteen billion, eight hundred fifty million, seven hundred eighty-one thousand, four hundred thirty-three".