516166446421 has 8 divisors (see below), whose sum is σ = 530437152960. Its totient is φ = 501998777952.

The previous prime is 516166446401. The next prime is 516166446457. The reversal of 516166446421 is 124644661615.

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 516166446421 - 2⁷ = 516166446293 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 (516166446401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25749361 + ... + 25769398.

It is an arithmetic number, because the mean of its divisors is an integer number (66304644120).

Almost surely, 2^516166446421 is an apocalyptic number.

It is an amenable number.

516166446421 is a deficient number, since it is larger than the sum of its proper divisors (14270706539).

516166446421 is a wasteful number, since it uses less digits than its factorization.

516166446421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51519035.

The product of its digits is 829440, while the sum is 46.

The spelling of 516166446421 in words is "five hundred sixteen billion, one hundred sixty-six million, four hundred forty-six thousand, four hundred twenty-one".