1248978049919 has 2 divisors, whose sum is σ = 1248978049920. Its totient is φ = 1248978049918.

The previous prime is 1248978049909. The next prime is 1248978049999. The reversal of 1248978049919 is 9199408798421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1248978049919 - 2¹² = 1248978045823 is a prime.

It is a super-2 number, since 2×1248978049919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248978049909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624489024959 + 624489024960.

It is an arithmetic number, because the mean of its divisors is an integer number (624489024960).

Almost surely, 2^{1248978049919} is an apocalyptic number.

1248978049919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248978049919 is an equidigital number, since it uses as much as digits as its factorization.

1248978049919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 71.

The spelling of 1248978049919 in words is "one trillion, two hundred forty-eight billion, nine hundred seventy-eight million, forty-nine thousand, nine hundred nineteen".