1220913784552 has 192 divisors, whose sum is σ = 3051469117440. Its totient is φ = 451980144000.

The previous prime is 1220913784523. The next prime is 1220913784577. The reversal of 1220913784552 is 2554873190221.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 1220913784496 and 1220913784505.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 14934813 + ... + 15016339.

It is an arithmetic number, because the mean of its divisors is an integer number (15893068320).

Almost surely, 2^{1220913784552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220913784552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525734558720).

1220913784552 is an abundant number, since it is smaller than the sum of its proper divisors (1830555332888).

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

1220913784552 is a wasteful number, since it uses less digits than its factorization.

1220913784552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81732 (or 81721 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 1220913784552 in words is "one trillion, two hundred twenty billion, nine hundred thirteen million, seven hundred eighty-four thousand, five hundred fifty-two".