1248978049936 has 20 divisors (see below), whose sum is σ = 2420249331852. Its totient is φ = 624397577216.

The previous prime is 1248978049919. The next prime is 1248978049999. The reversal of 1248978049936 is 6399408798421.

It can be written as a sum of positive squares in 2 ways, for example, as 495554049936 + 753424000000 = 703956^2 + 868000^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5602741 + ... + 5821396.

Almost surely, 2^{1248978049936} is an apocalyptic number.

1248978049936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1248978049936 is a deficient number, since it is larger than the sum of its proper divisors (1171271281916).

1248978049936 is a wasteful number, since it uses less digits than its factorization.

1248978049936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11430978 (or 11430972 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 70.

The spelling of 1248978049936 in words is "one trillion, two hundred forty-eight billion, nine hundred seventy-eight million, forty-nine thousand, nine hundred thirty-six".