1220278789716 has 24 divisors (see below), whose sum is σ = 3254076772800. Its totient is φ = 348651082752.

The previous prime is 1220278789711. The next prime is 1220278789727. The reversal of 1220278789716 is 6179878720221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220278789716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220278789711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7263564141 + ... + 7263564308.

It is an arithmetic number, because the mean of its divisors is an integer number (135586532200).

Almost surely, 2^{1220278789716} is an apocalyptic number.

It is an amenable number.

1220278789716 is an abundant number, since it is smaller than the sum of its proper divisors (2033797983084).

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

1220278789716 is a wasteful number, since it uses less digits than its factorization.

1220278789716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14527128463 (or 14527128461 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 60.

The spelling of 1220278789716 in words is "one trillion, two hundred twenty billion, two hundred seventy-eight million, seven hundred eighty-nine thousand, seven hundred sixteen".