16352640505 has 8 divisors (see below), whose sum is σ = 19652158152. Its totient is φ = 13062786048.

The previous prime is 16352640503. The next prime is 16352640517. The reversal of 16352640505 is 50504625361.

It can be written as a sum of positive squares in 4 ways, for example, as 9454839696 + 6897800809 = 97236^2 + 83053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16352640505 - 2¹ = 16352640503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16352640503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2412072 + ... + 2418841.

It is an arithmetic number, because the mean of its divisors is an integer number (2456519769).

Almost surely, 2^16352640505 is an apocalyptic number.

It is an amenable number.

16352640505 is a deficient number, since it is larger than the sum of its proper divisors (3299517647).

16352640505 is an equidigital number, since it uses as much as digits as its factorization.

16352640505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831595.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 16352640505 in words is "sixteen billion, three hundred fifty-two million, six hundred forty thousand, five hundred five".