249499968442625 has 16 divisors (see below), whose sum is σ = 311387610670032. Its totient is φ = 199592506771200.

The previous prime is 249499968442601. The next prime is 249499968442663. The reversal of 249499968442625 is 526244869994942.

It is a Cunningham number, because it is equal to 15795568²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 81572995777729 + 167926972664896 = 9031777^2 + 12958664^2 .

It is not a de Polignac number, because 249499968442625 - 2⁸ = 249499968442369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33984422 + ... + 40668671.

It is an arithmetic number, because the mean of its divisors is an integer number (19461725666877).

Almost surely, 2^{249499968442625} is an apocalyptic number.

249499968442625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249499968442625 is a deficient number, since it is larger than the sum of its proper divisors (61887642227407).

249499968442625 is an equidigital number, since it uses as much as digits as its factorization.

249499968442625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74679845 (or 74679835 counting only the distinct ones).

The product of its digits is 19349176320, while the sum is 83.

The spelling of 249499968442625 in words is "two hundred forty-nine trillion, four hundred ninety-nine billion, nine hundred sixty-eight million, four hundred forty-two thousand, six hundred twenty-five".