248783137991 has 2 divisors, whose sum is σ = 248783137992. Its totient is φ = 248783137990.

The previous prime is 248783137987. The next prime is 248783138047. The reversal of 248783137991 is 199731387842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248783137991 - 2² = 248783137987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248783137901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124391568995 + 124391568996.

It is an arithmetic number, because the mean of its divisors is an integer number (124391568996).

Almost surely, 2^248783137991 is an apocalyptic number.

248783137991 is a deficient number, since it is larger than the sum of its proper divisors (1).

248783137991 is an equidigital number, since it uses as much as digits as its factorization.

248783137991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The spelling of 248783137991 in words is "two hundred forty-eight billion, seven hundred eighty-three million, one hundred thirty-seven thousand, nine hundred ninety-one".