516564890 has 32 divisors (see below), whose sum is σ = 986215824. Its totient is φ = 194135040.

The previous prime is 516564869. The next prime is 516564899. The reversal of 516564890 is 98465615.

It can be written as a sum of positive squares in 8 ways, for example, as 246521401 + 270043489 = 15701^2 + 16433^2 .

It is not an unprimeable number, because it can be changed into a prime (516564899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110072 + ... + 114668.

Almost surely, 2^516564890 is an apocalyptic number.

516564890 is a deficient number, since it is larger than the sum of its proper divisors (469650934).

516564890 is a wasteful number, since it uses less digits than its factorization.

516564890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 516564890 is about 22728.0639298643. The cubic root of 516564890 is about 802.3705157559.

The spelling of 516564890 in words is "five hundred sixteen million, five hundred sixty-four thousand, eight hundred ninety".