518624641 has 2 divisors, whose sum is σ = 518624642. Its totient is φ = 518624640.

The previous prime is 518624629. The next prime is 518624647. The reversal of 518624641 is 146426815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372335616 + 146289025 = 19296^2 + 12095^2 .

It is a cyclic number.

It is not a de Polignac number, because 518624641 - 2⁵ = 518624609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 518624641.

It is not a weakly prime, because it can be changed into another prime (518624647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259312320 + 259312321.

It is an arithmetic number, because the mean of its divisors is an integer number (259312321).

Almost surely, 2^518624641 is an apocalyptic number.

It is an amenable number.

518624641 is a deficient number, since it is larger than the sum of its proper divisors (1).

518624641 is an equidigital number, since it uses as much as digits as its factorization.

518624641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 518624641 is about 22773.3317940085. The cubic root of 518624641 is about 803.4355589031.

The spelling of 518624641 in words is "five hundred eighteen million, six hundred twenty-four thousand, six hundred forty-one".