16506521353344 has 64 divisors (see below), whose sum is σ = 47831397115680. Its totient is φ = 5001976166400.

The previous prime is 16506521353303. The next prime is 16506521353367. The reversal of 16506521353344 is 44335312560561.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 16506521353293 and 16506521353302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1953892717 + ... + 1953901164.

Almost surely, 2^{16506521353344} is an apocalyptic number.

It is an amenable number.

16506521353344 is an abundant number, since it is smaller than the sum of its proper divisors (31324875762336).

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

16506521353344 is a wasteful number, since it uses less digits than its factorization.

16506521353344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907793909 (or 3907793897 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 16506521353344 in words is "sixteen trillion, five hundred six billion, five hundred twenty-one million, three hundred fifty-three thousand, three hundred forty-four".