4561516493 has 2 divisors, whose sum is σ = 4561516494. Its totient is φ = 4561516492.

The previous prime is 4561516489. The next prime is 4561516507. The reversal of 4561516493 is 3946151654.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4475342404 + 86174089 = 66898^2 + 9283^2 .

It is a cyclic number.

It is not a de Polignac number, because 4561516493 - 2² = 4561516489 is a prime.

It is a super-2 number, since 2×4561516493² = 41614865431822038098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4561516403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2280758246 + 2280758247.

It is an arithmetic number, because the mean of its divisors is an integer number (2280758247).

Almost surely, 2^4561516493 is an apocalyptic number.

It is an amenable number.

4561516493 is a deficient number, since it is larger than the sum of its proper divisors (1).

4561516493 is an equidigital number, since it uses as much as digits as its factorization.

4561516493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 4561516493 is about 67538.9997927124. Note that the first 3 decimals coincide. The cubic root of 4561516493 is about 1658.4526749789.

The spelling of 4561516493 in words is "four billion, five hundred sixty-one million, five hundred sixteen thousand, four hundred ninety-three".