249612731869439 has 4 divisors (see below), whose sum is σ = 250168662230400. Its totient is φ = 249056801508480.

The previous prime is 249612731869367. The next prime is 249612731869447. The reversal of 249612731869439 is 934968137216942.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249612731869439 is a prime.

It is a super-2 number, since 2×249612731869439² (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 (249612731839439) 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, 277965179807 + ... + 277965180704.

It is an arithmetic number, because the mean of its divisors is an integer number (62542165557600).

Almost surely, 2^{249612731869439} is an apocalyptic number.

249612731869439 is a deficient number, since it is larger than the sum of its proper divisors (555930360961).

249612731869439 is an equidigital number, since it uses as much as digits as its factorization.

249612731869439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555930360960.

The product of its digits is 846526464, while the sum is 74.

The spelling of 249612731869439 in words is "two hundred forty-nine trillion, six hundred twelve billion, seven hundred thirty-one million, eight hundred sixty-nine thousand, four hundred thirty-nine".