499905561593 has 2 divisors, whose sum is σ = 499905561594. Its totient is φ = 499905561592.

The previous prime is 499905561587. The next prime is 499905561611. The reversal of 499905561593 is 395165509994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381489051904 + 118416509689 = 617648^2 + 344117^2 .

It is a cyclic number.

It is not a de Polignac number, because 499905561593 - 2³⁰ = 498831819769 is a prime.

It is a super-2 number, since 2×499905561593² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (499905561523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249952780796 + 249952780797.

It is an arithmetic number, because the mean of its divisors is an integer number (249952780797).

Almost surely, 2^499905561593 is an apocalyptic number.

It is an amenable number.

499905561593 is a deficient number, since it is larger than the sum of its proper divisors (1).

499905561593 is an equidigital number, since it uses as much as digits as its factorization.

499905561593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59049000, while the sum is 65.

The spelling of 499905561593 in words is "four hundred ninety-nine billion, nine hundred five million, five hundred sixty-one thousand, five hundred ninety-three".