16971616542553 has 4 divisors (see below), whose sum is σ = 16972449771060. Its totient is φ = 16970783314048.

The previous prime is 16971616542541. The next prime is 16971616542557. The reversal of 16971616542553 is 35524561617961.

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 4183182550089 + 12788433992464 = 2045283^2 + 3576092^2 .

It is a cyclic number.

It is not a de Polignac number, because 16971616542553 - 2¹⁷ = 16971616411481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16971616542491 and 16971616542500.

It is not an unprimeable number, because it can be changed into a prime (16971616542557) 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, 416583700 + ... + 416624437.

It is an arithmetic number, because the mean of its divisors is an integer number (4243112442765).

Almost surely, 2^{16971616542553} is an apocalyptic number.

It is an amenable number.

16971616542553 is a deficient number, since it is larger than the sum of its proper divisors (833228507).

16971616542553 is an equidigital number, since it uses as much as digits as its factorization.

16971616542553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833228506.

The product of its digits is 40824000, while the sum is 61.

The spelling of 16971616542553 in words is "sixteen trillion, nine hundred seventy-one billion, six hundred sixteen million, five hundred forty-two thousand, five hundred fifty-three".