16345721033 has 16 divisors (see below), whose sum is σ = 17501552640. Its totient is φ = 15220774800.

The previous prime is 16345721003. The next prime is 16345721039. The reversal of 16345721033 is 33012754361.

It is a cyclic number.

It is not a de Polignac number, because 16345721033 - 2⁶ = 16345720969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16345720984 and 16345721002.

It is not an unprimeable number, because it can be changed into a prime (16345721039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428216 + ... + 464822.

It is an arithmetic number, because the mean of its divisors is an integer number (1093847040).

Almost surely, 2^16345721033 is an apocalyptic number.

It is an amenable number.

16345721033 is a deficient number, since it is larger than the sum of its proper divisors (1155831607).

16345721033 is a wasteful number, since it uses less digits than its factorization.

16345721033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37028.

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 16345721033 in words is "sixteen billion, three hundred forty-five million, seven hundred twenty-one thousand, thirty-three".