1263243342240 has 576 divisors, whose sum is σ = 4811052879360. Its totient is φ = 299208376320.

The previous prime is 1263243342227. The next prime is 1263243342247. The reversal of 1263243342240 is 422433423621.

1263243342240 is a `hidden beast` number, since 1 + 2 + 6 + 32 + 43 + 342 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1263243342195 and 1263243342204.

It is not an unprimeable number, because it can be changed into a prime (1263243342247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 593349496 + ... + 593351624.

It is an arithmetic number, because the mean of its divisors is an integer number (8352522360).

Almost surely, 2^{1263243342240} is an apocalyptic number.

1263243342240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263243342240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405526439680).

1263243342240 is an abundant number, since it is smaller than the sum of its proper divisors (3547809537120).

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

1263243342240 is a wasteful number, since it uses less digits than its factorization.

1263243342240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005 (or 2994 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 1263243342240 its reverse (422433423621), we get a palindrome (1685676765861).

The spelling of 1263243342240 in words is "one trillion, two hundred sixty-three billion, two hundred forty-three million, three hundred forty-two thousand, two hundred forty".