6516161971 has 8 divisors (see below), whose sum is σ = 7128345600. Its totient is φ = 5907279240.

The previous prime is 6516161941. The next prime is 6516162001. The reversal of 6516161971 is 1791616156.

It is an interprime number because it is at equal distance from previous prime (6516161941) and next prime (6516162001).

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

It is a cyclic number.

It is not a de Polignac number, because 6516161971 - 2³¹ = 4368678323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6516161941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821091 + ... + 828988.

It is an arithmetic number, because the mean of its divisors is an integer number (891043200).

Almost surely, 2^6516161971 is an apocalyptic number.

6516161971 is a deficient number, since it is larger than the sum of its proper divisors (612183629).

6516161971 is a wasteful number, since it uses less digits than its factorization.

6516161971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650449.

The product of its digits is 68040, while the sum is 43.

The square root of 6516161971 is about 80722.7475436757. The cubic root of 6516161971 is about 1867.8010862993.

The spelling of 6516161971 in words is "six billion, five hundred sixteen million, one hundred sixty-one thousand, nine hundred seventy-one".