1671716517 has 8 divisors (see below), whose sum is σ = 2238522624. Its totient is φ = 1109694048.

The previous prime is 1671716507. The next prime is 1671716537. The reversal of 1671716517 is 7156171761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1671716517 - 2¹² = 1671712421 is a prime.

It is a super-2 number, since 2×1671716517² = 5589272226421222578, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671716507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195093 + ... + 1196490.

It is an arithmetic number, because the mean of its divisors is an integer number (279815328).

Almost surely, 2^1671716517 is an apocalyptic number.

It is an amenable number.

1671716517 is a deficient number, since it is larger than the sum of its proper divisors (566806107).

1671716517 is a wasteful number, since it uses less digits than its factorization.

1671716517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391819.

The product of its digits is 61740, while the sum is 42.

The square root of 1671716517 is about 40886.6300518886. The cubic root of 1671716517 is about 1186.8273460604.

The spelling of 1671716517 in words is "one billion, six hundred seventy-one million, seven hundred sixteen thousand, five hundred seventeen".