16324405645 has 4 divisors (see below), whose sum is σ = 19589286780. Its totient is φ = 13059524512.

The previous prime is 16324405639. The next prime is 16324405649. The reversal of 16324405645 is 54650442361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8854433604 + 7469972041 = 94098^2 + 86429^2 .

It is a cyclic number.

It is not a de Polignac number, because 16324405645 - 2³ = 16324405637 is a prime.

It is a super-3 number, since 3×16324405645³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16324405598 and 16324405607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16324405649) 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, 1632440560 + ... + 1632440569.

It is an arithmetic number, because the mean of its divisors is an integer number (4897321695).

Almost surely, 2^16324405645 is an apocalyptic number.

It is an amenable number.

16324405645 is a deficient number, since it is larger than the sum of its proper divisors (3264881135).

16324405645 is an equidigital number, since it uses as much as digits as its factorization.

16324405645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264881134.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 16324405645 in words is "sixteen billion, three hundred twenty-four million, four hundred five thousand, six hundred forty-five".