16657574570213 has 4 divisors (see below), whose sum is σ = 16779162705900. Its totient is φ = 16535986434528.

The previous prime is 16657574570179. The next prime is 16657574570267. The reversal of 16657574570213 is 31207547575661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4333529014369 + 12324045555844 = 2081713^2 + 3510562^2 .

It is a cyclic number.

It is not a de Polignac number, because 16657574570213 - 2³² = 16653279602917 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 (16657574578213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60794067638 + ... + 60794067911.

It is an arithmetic number, because the mean of its divisors is an integer number (4194790676475).

Almost surely, 2^{16657574570213} is an apocalyptic number.

It is an amenable number.

16657574570213 is a deficient number, since it is larger than the sum of its proper divisors (121588135687).

16657574570213 is a wasteful number, since it uses less digits than its factorization.

16657574570213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121588135686.

The product of its (nonzero) digits is 37044000, while the sum is 59.

The spelling of 16657574570213 in words is "sixteen trillion, six hundred fifty-seven billion, five hundred seventy-four million, five hundred seventy thousand, two hundred thirteen".