516323237945 has 4 divisors (see below), whose sum is σ = 619587885540. Its totient is φ = 413058590352.

The previous prime is 516323237933. The next prime is 516323237957. The reversal of 516323237945 is 549732323615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549732323615 = 5 ⋅109946464723.

It is an interprime number because it is at equal distance from previous prime (516323237933) and next prime (516323237957).

It can be written as a sum of positive squares in 2 ways, for example, as 144950002729 + 371373235216 = 380723^2 + 609404^2 .

It is a cyclic number.

It is not a de Polignac number, because 516323237945 - 2²⁴ = 516306460729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 516323237893 and 516323237902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51632323790 + ... + 51632323799.

It is an arithmetic number, because the mean of its divisors is an integer number (154896971385).

Almost surely, 2^516323237945 is an apocalyptic number.

It is an amenable number.

516323237945 is a deficient number, since it is larger than the sum of its proper divisors (103264647595).

516323237945 is a wasteful number, since it uses less digits than its factorization.

516323237945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103264647594.

The product of its digits is 4082400, while the sum is 50.

The spelling of 516323237945 in words is "five hundred sixteen billion, three hundred twenty-three million, two hundred thirty-seven thousand, nine hundred forty-five".