516556161 has 24 divisors (see below), whose sum is σ = 815355840. Its totient is φ = 312530400.

The previous prime is 516556147. The next prime is 516556177. The reversal of 516556161 is 161655615.

It is not a de Polignac number, because 516556161 - 2⁵ = 516556129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (516556111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58335 + ... + 66603.

It is an arithmetic number, because the mean of its divisors is an integer number (33973160).

Almost surely, 2^516556161 is an apocalyptic number.

It is an amenable number.

516556161 is a deficient number, since it is larger than the sum of its proper divisors (298799679).

516556161 is a wasteful number, since it uses less digits than its factorization.

516556161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8917 (or 8914 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 516556161 is about 22727.8718977382. The cubic root of 516556161 is about 802.3659962000.

The spelling of 516556161 in words is "five hundred sixteen million, five hundred fifty-six thousand, one hundred sixty-one".