249387999968 has 12 divisors (see below), whose sum is σ = 490982625000. Its totient is φ = 124693999968.

The previous prime is 249387999943. The next prime is 249387999989. The reversal of 249387999968 is 869999783942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3896687468 + ... + 3896687531.

It is an arithmetic number, because the mean of its divisors is an integer number (40915218750).

Almost surely, 2^249387999968 is an apocalyptic number.

It is an amenable number.

249387999968 is a deficient number, since it is larger than the sum of its proper divisors (241594625032).

249387999968 is an equidigital number, since it uses as much as digits as its factorization.

249387999968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7793375009 (or 7793375001 counting only the distinct ones).

The product of its digits is 3809369088, while the sum is 83.

The spelling of 249387999968 in words is "two hundred forty-nine billion, three hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred sixty-eight".