249999722216663 has 4 divisors (see below), whose sum is σ = 256756471465800. Its totient is φ = 243242972967528.

The previous prime is 249999722216653. The next prime is 249999722216669. The reversal of 249999722216663 is 366612227999942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249999722216663 - 2³⁸ = 249724844309719 is a prime.

It is a super-2 number, since 2×249999722216663² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249999722216669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378374624513 + ... + 3378374624586.

It is an arithmetic number, because the mean of its divisors is an integer number (64189117866450).

Almost surely, 2^{249999722216663} is an apocalyptic number.

249999722216663 is a deficient number, since it is larger than the sum of its proper divisors (6756749249137).

249999722216663 is an equidigital number, since it uses as much as digits as its factorization.

249999722216663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756749249136.

The product of its digits is 1904684544, while the sum is 77.

The spelling of 249999722216663 in words is "two hundred forty-nine trillion, nine hundred ninety-nine billion, seven hundred twenty-two million, two hundred sixteen thousand, six hundred sixty-three".