16574955947561 has 16 divisors (see below), whose sum is σ = 18177415815168. Its totient is φ = 14988445510800.

The previous prime is 16574955947531. The next prime is 16574955947569.

16574955947561 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 16574955947561 - 2⁶ = 16574955947497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16574955947569) 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 15 ways as a sum of consecutive naturals, for example, 40781996 + ... + 41186418.

It is an arithmetic number, because the mean of its divisors is an integer number (1136088488448).

Almost surely, 2^{16574955947561} is an apocalyptic number.

16574955947561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16574955947561 is a deficient number, since it is larger than the sum of its proper divisors (1602459867607).

16574955947561 is a wasteful number, since it uses less digits than its factorization.

16574955947561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424132.

The product of its digits is 1428840000, while the sum is 74.

The spelling of 16574955947561 in words is "sixteen trillion, five hundred seventy-four billion, nine hundred fifty-five million, nine hundred forty-seven thousand, five hundred sixty-one".