16520448735 has 36 divisors (see below), whose sum is σ = 33310623528. Its totient is φ = 7552204128.

The previous prime is 16520448709. The next prime is 16520448739. The reversal of 16520448735 is 53784402561.

16520448735 is a `hidden beast` number, since 1 + 6 + 520 + 44 + 87 + 3 + 5 = 666.

It is not a de Polignac number, because 16520448735 - 2¹⁰ = 16520447711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16520448739) 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 35 ways as a sum of consecutive naturals, for example, 3743929 + ... + 3748338.

It is an arithmetic number, because the mean of its divisors is an integer number (925295098).

Almost surely, 2^16520448735 is an apocalyptic number.

16520448735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16520448735 is an abundant number, since it is smaller than the sum of its proper divisors (16790174793).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16520448735 is a wasteful number, since it uses less digits than its factorization.

16520448735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492292 (or 7492282 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 16520448735 in words is "sixteen billion, five hundred twenty million, four hundred forty-eight thousand, seven hundred thirty-five".