16451366571231 has 4 divisors (see below), whose sum is σ = 21935155428312. Its totient is φ = 10967577714152.

The previous prime is 16451366571193. The next prime is 16451366571301. The reversal of 16451366571231 is 13217566315461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16451366571231 - 2¹⁰ = 16451366570207 is a prime.

It is a super-2 number, since 2×16451366571231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16451366571131) 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, 2741894428536 + ... + 2741894428541.

It is an arithmetic number, because the mean of its divisors is an integer number (5483788857078).

Almost surely, 2^{16451366571231} is an apocalyptic number.

16451366571231 is a deficient number, since it is larger than the sum of its proper divisors (5483788857081).

16451366571231 is an equidigital number, since it uses as much as digits as its factorization.

16451366571231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483788857080.

The product of its digits is 2721600, while the sum is 51.

The spelling of 16451366571231 in words is "sixteen trillion, four hundred fifty-one billion, three hundred sixty-six million, five hundred seventy-one thousand, two hundred thirty-one".