516115561 has 8 divisors (see below), whose sum is σ = 579983040. Its totient is φ = 455700432.

The previous prime is 516115549. The next prime is 516115573. The reversal of 516115561 is 165511615.

It is an interprime number because it is at equal distance from previous prime (516115549) and next prime (516115573).

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 516115561 - 2¹⁵ = 516082793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (516115511) 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, 862771 + ... + 863368.

It is an arithmetic number, because the mean of its divisors is an integer number (72497880).

Almost surely, 2^516115561 is an apocalyptic number.

It is an amenable number.

516115561 is a deficient number, since it is larger than the sum of its proper divisors (63867479).

516115561 is a wasteful number, since it uses less digits than its factorization.

516115561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726175.

The product of its digits is 4500, while the sum is 31.

The square root of 516115561 is about 22718.1768854809. The cubic root of 516115561 is about 802.1378035107.

The spelling of 516115561 in words is "five hundred sixteen million, one hundred fifteen thousand, five hundred sixty-one".