1200044782520 has 64 divisors (see below), whose sum is σ = 2860773642720. Its totient is φ = 451490258944.

The previous prime is 1200044782483. The next prime is 1200044782583. The reversal of 1200044782520 is 252874400021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487859 + ... + 1624221.

Almost surely, 2^{1200044782520} is an apocalyptic number.

1200044782520 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 1200044782520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430386821360).

1200044782520 is an abundant number, since it is smaller than the sum of its proper divisors (1660728860200).

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

1200044782520 is a wasteful number, since it uses less digits than its factorization.

1200044782520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137944 (or 1137940 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The spelling of 1200044782520 in words is "one trillion, two hundred billion, forty-four million, seven hundred eighty-two thousand, five hundred twenty".