1244155543340 has 48 divisors (see below), whose sum is σ = 2616737441472. Its totient is φ = 496898578176.

The previous prime is 1244155543297. The next prime is 1244155543343. The reversal of 1244155543340 is 433455514421.

It is not an unprimeable number, because it can be changed into a prime (1244155543343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92861522 + ... + 92874918.

It is an arithmetic number, because the mean of its divisors is an integer number (54515363364).

Almost surely, 2^{1244155543340} is an apocalyptic number.

1244155543340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244155543340 is an abundant number, since it is smaller than the sum of its proper divisors (1372581898132).

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

1244155543340 is a wasteful number, since it uses less digits than its factorization.

1244155543340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20186 (or 20184 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

The spelling of 1244155543340 in words is "one trillion, two hundred forty-four billion, one hundred fifty-five million, five hundred forty-three thousand, three hundred forty".