516463451645 has 4 divisors (see below), whose sum is σ = 619756141980. Its totient is φ = 413170761312.

The previous prime is 516463451641. The next prime is 516463451671. The reversal of 516463451645 is 546154364615.

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 56504142436 + 459959309209 = 237706^2 + 678203^2 .

It is a cyclic number.

It is not a de Polignac number, because 516463451645 - 2² = 516463451641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 516463451593 and 516463451602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516463451641) 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, 51646345160 + ... + 51646345169.

It is an arithmetic number, because the mean of its divisors is an integer number (154939035495).

Almost surely, 2^516463451645 is an apocalyptic number.

It is an amenable number.

516463451645 is a deficient number, since it is larger than the sum of its proper divisors (103292690335).

516463451645 is a wasteful number, since it uses less digits than its factorization.

516463451645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103292690334.

The product of its digits is 5184000, while the sum is 50.

The spelling of 516463451645 in words is "five hundred sixteen billion, four hundred sixty-three million, four hundred fifty-one thousand, six hundred forty-five".