16561750013 has 8 divisors (see below), whose sum is σ = 17554122432. Its totient is φ = 15571394496.

The previous prime is 16561749989. The next prime is 16561750019. The reversal of 16561750013 is 31005716561.

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 16561750013 - 2⁶ = 16561749949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16561750019) 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, 487295 + ... + 520172.

It is an arithmetic number, because the mean of its divisors is an integer number (2194265304).

Almost surely, 2^16561750013 is an apocalyptic number.

It is an amenable number.

16561750013 is a deficient number, since it is larger than the sum of its proper divisors (992372419).

16561750013 is a wasteful number, since it uses less digits than its factorization.

16561750013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008451.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 16561750013 in words is "sixteen billion, five hundred sixty-one million, seven hundred fifty thousand, thirteen".