1248978049999 has 2 divisors, whose sum is σ = 1248978050000. Its totient is φ = 1248978049998.

The previous prime is 1248978049919. The next prime is 1248978050041. The reversal of 1248978049999 is 9999408798421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1248978049999 - 2¹³ = 1248978041807 is a prime.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 624489024999 + 624489025000.

It is an arithmetic number, because the mean of its divisors is an integer number (624489025000).

Almost surely, 2^{1248978049999} is an apocalyptic number.

1248978049999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248978049999 is an equidigital number, since it uses as much as digits as its factorization.

1248978049999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846526464, while the sum is 79.

The spelling of 1248978049999 in words is "one trillion, two hundred forty-eight billion, nine hundred seventy-eight million, forty-nine thousand, nine hundred ninety-nine".