516499236641 has 4 divisors (see below), whose sum is σ = 516579983892. Its totient is φ = 516418489392.

The previous prime is 516499236611. The next prime is 516499236647. The reversal of 516499236641 is 146632994615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199750894225 + 316748342416 = 446935^2 + 562804^2 .

It is a cyclic number.

It is not a de Polignac number, because 516499236641 - 2⁶ = 516499236577 is a prime.

It is a super-2 number, since 2×516499236641² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516499236647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40364030 + ... + 40376823.

It is an arithmetic number, because the mean of its divisors is an integer number (129144995973).

Almost surely, 2^516499236641 is an apocalyptic number.

It is an amenable number.

516499236641 is a deficient number, since it is larger than the sum of its proper divisors (80747251).

516499236641 is an equidigital number, since it uses as much as digits as its factorization.

516499236641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80747250.

The product of its digits is 8398080, while the sum is 56.

The spelling of 516499236641 in words is "five hundred sixteen billion, four hundred ninety-nine million, two hundred thirty-six thousand, six hundred forty-one".