16504213445 has 12 divisors (see below), whose sum is σ = 21038590884. Its totient is φ = 12426700800.

The previous prime is 16504213441. The next prime is 16504213463. The reversal of 16504213445 is 54431240561.

It can be written as a sum of positive squares in 6 ways, for example, as 4732614436 + 11771599009 = 68794^2 + 108497^2 .

It is not a de Polignac number, because 16504213445 - 2² = 16504213441 is a prime.

It is a super-2 number, since 2×16504213445² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16504213441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5709356 + ... + 5712245.

It is an arithmetic number, because the mean of its divisors is an integer number (1753215907).

Almost surely, 2^16504213445 is an apocalyptic number.

It is an amenable number.

16504213445 is a deficient number, since it is larger than the sum of its proper divisors (4534377439).

16504213445 is a wasteful number, since it uses less digits than its factorization.

16504213445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11421640 (or 11421623 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 16504213445 in words is "sixteen billion, five hundred four million, two hundred thirteen thousand, four hundred forty-five".