1263983938250 has 96 divisors (see below), whose sum is σ = 2627659092240. Its totient is φ = 454891008000.

The previous prime is 1263983938241. The next prime is 1263983938267. The reversal of 1263983938250 is 528393893621.

It can be written as a sum of positive squares in 8 ways, for example, as 44017298809 + 1219966639441 = 209803^2 + 1104521^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1263983938250.

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 in 47 ways as a sum of consecutive naturals, for example, 2718866 + ... + 3149634.

Almost surely, 2^{1263983938250} is an apocalyptic number.

1263983938250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263983938250 is an abundant number, since it is smaller than the sum of its proper divisors (1363675153990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263983938250 is a wasteful number, since it uses less digits than its factorization.

1263983938250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430905 (or 430884 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 1263983938250 in words is "one trillion, two hundred sixty-three billion, nine hundred eighty-three million, nine hundred thirty-eight thousand, two hundred fifty".