16781319408233 has 8 divisors (see below), whose sum is σ = 16783363524096. Its totient is φ = 16779275452800.

The previous prime is 16781319408221. The next prime is 16781319408283. The reversal of 16781319408233 is 33280491318761.

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 16781319408233 - 2¹⁴ = 16781319391849 is a prime.

It is a super-2 number, since 2×16781319408233² (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 (16781319408283) 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, 438926228 + ... + 438964458.

It is an arithmetic number, because the mean of its divisors is an integer number (2097920440512).

Almost surely, 2^{16781319408233} is an apocalyptic number.

It is an amenable number.

16781319408233 is a deficient number, since it is larger than the sum of its proper divisors (2044115863).

16781319408233 is a wasteful number, since it uses less digits than its factorization.

16781319408233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80215.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 16781319408233 in words is "sixteen trillion, seven hundred eighty-one billion, three hundred nineteen million, four hundred eight thousand, two hundred thirty-three".