1284842779440 has 320 divisors, whose sum is σ = 4377033137664. Its totient is φ = 309196800000.

The previous prime is 1284842779403. The next prime is 1284842779453. The reversal of 1284842779440 is 449772484821.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 63 ways as a sum of consecutive naturals, for example, 210592390 + ... + 210598490.

Almost surely, 2^{1284842779440} is an apocalyptic number.

1284842779440 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 1284842779440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2188516568832).

1284842779440 is an abundant number, since it is smaller than the sum of its proper divisors (3092190358224).

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

1284842779440 is a wasteful number, since it uses less digits than its factorization.

1284842779440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700 (or 6694 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 60.

The spelling of 1284842779440 in words is "one trillion, two hundred eighty-four billion, eight hundred forty-two million, seven hundred seventy-nine thousand, four hundred forty".