16971616542555 has 48 divisors (see below), whose sum is σ = 30517307009280. Its totient is φ = 9048472050528.

The previous prime is 16971616542541. The next prime is 16971616542557. The reversal of 16971616542555 is 55524561617961.

16971616542555 is a `hidden beast` number, since 1 + 6 + 9 + 7 + 1 + 616 + 5 + 4 + 2 + 5 + 5 + 5 = 666.

It is not a de Polignac number, because 16971616542555 - 2¹⁰ = 16971616541531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16971616542492 and 16971616542501.

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 47 ways as a sum of consecutive naturals, for example, 1242906 + ... + 5957184.

It is an arithmetic number, because the mean of its divisors is an integer number (635777229360).

Almost surely, 2^{16971616542555} is an apocalyptic number.

16971616542555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16971616542555 is a deficient number, since it is larger than the sum of its proper divisors (13545690466725).

16971616542555 is an equidigital number, since it uses as much as digits as its factorization.

16971616542555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717262 (or 4717250 counting only the distinct ones).

The product of its digits is 68040000, while the sum is 63.

The spelling of 16971616542555 in words is "sixteen trillion, nine hundred seventy-one billion, six hundred sixteen million, five hundred forty-two thousand, five hundred fifty-five".