516891816 has 48 divisors (see below), whose sum is σ = 1599904800. Its totient is φ = 147683232.

The previous prime is 516891803. The next prime is 516891829. The reversal of 516891816 is 618198615.

It is an interprime number because it is at equal distance from previous prime (516891803) and next prime (516891829).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 512286 + ... + 513293.

It is an arithmetic number, because the mean of its divisors is an integer number (33331350).

Almost surely, 2^516891816 is an apocalyptic number.

516891816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

516891816 is an abundant number, since it is smaller than the sum of its proper divisors (1083012984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516891816 is a wasteful number, since it uses less digits than its factorization.

516891816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025598 (or 1025591 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 516891816 is about 22735.2549138997. The cubic root of 516891816 is about 802.5397493922.

The spelling of 516891816 in words is "five hundred sixteen million, eight hundred ninety-one thousand, eight hundred sixteen".