1244962135872 has 1680 divisors, whose sum is σ = 4983236330688. Its totient is φ = 303495413760.

The previous prime is 1244962135853. The next prime is 1244962135927. The reversal of 1244962135872 is 2785312694421.

It is a happy number.

1244962135872 is a `hidden beast` number, since 1 + 2 + 4 + 4 + 9 + 621 + 3 + 5 + 8 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 239 ways as a sum of consecutive naturals, for example, 3761214747 + ... + 3761215077.

Almost surely, 2^{1244962135872} is an apocalyptic number.

1244962135872 is a gapful number since it is divisible by the number (12) 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 1244962135872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2491618165344).

1244962135872 is an abundant number, since it is smaller than the sum of its proper divisors (3738274194816).

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

1244962135872 is a wasteful number, since it uses less digits than its factorization.

1244962135872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 440 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 1244962135872 in words is "one trillion, two hundred forty-four billion, nine hundred sixty-two million, one hundred thirty-five thousand, eight hundred seventy-two".