16456413321 has 48 divisors (see below), whose sum is σ = 25533565200. Its totient is φ = 10176897024.

The previous prime is 16456413301. The next prime is 16456413329. The reversal of 16456413321 is 12331465461.

16456413321 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 641 + 3 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4588707600 + 11867705721 = 67740^2 + 108939^2 .

It is not a de Polignac number, because 16456413321 - 2⁵ = 16456413289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16456413329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3282865 + ... + 3287873.

It is an arithmetic number, because the mean of its divisors is an integer number (531949275).

Almost surely, 2^16456413321 is an apocalyptic number.

It is an amenable number.

16456413321 is a deficient number, since it is larger than the sum of its proper divisors (9077151879).

16456413321 is a wasteful number, since it uses less digits than its factorization.

16456413321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338 (or 5335 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 16456413321 its reverse (12331465461), we get a palindrome (28787878782).

The spelling of 16456413321 in words is "sixteen billion, four hundred fifty-six million, four hundred thirteen thousand, three hundred twenty-one".