16471771672541 has 4 divisors (see below), whose sum is σ = 16540119273084. Its totient is φ = 16403424072000.

The previous prime is 16471771672523. The next prime is 16471771672561. The reversal of 16471771672541 is 14527617717461.

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 5696079129316 + 10775692543225 = 2386646^2 + 3282635^2 .

It is a cyclic number.

It is not a de Polignac number, because 16471771672541 - 2³⁸ = 16196893765597 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 (16471771672501) 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, 34173799910 + ... + 34173800391.

It is an arithmetic number, because the mean of its divisors is an integer number (4135029818271).

Almost surely, 2^{16471771672541} is an apocalyptic number.

It is an amenable number.

16471771672541 is a deficient number, since it is larger than the sum of its proper divisors (68347600543).

16471771672541 is an equidigital number, since it uses as much as digits as its factorization.

16471771672541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68347600542.

The product of its digits is 13829760, while the sum is 59.

The spelling of 16471771672541 in words is "sixteen trillion, four hundred seventy-one billion, seven hundred seventy-one million, six hundred seventy-two thousand, five hundred forty-one".