1556228008880 has 80 divisors (see below), whose sum is σ = 3665939472000. Its totient is φ = 614291358720.

The previous prime is 1556228008879. The next prime is 1556228008891. The reversal of 1556228008880 is 888008226551.

It is a tau number, because it is divible by the number of its divisors (80).

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, 12254510 + ... + 12380850.

It is an arithmetic number, because the mean of its divisors is an integer number (45824243400).

Almost surely, 2^{1556228008880} is an apocalyptic number.

1556228008880 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 1556228008880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832969736000).

1556228008880 is an abundant number, since it is smaller than the sum of its proper divisors (2109711463120).

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

1556228008880 is a wasteful number, since it uses less digits than its factorization.

1556228008880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128382 (or 128376 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 53.

The spelling of 1556228008880 in words is "one trillion, five hundred fifty-six billion, two hundred twenty-eight million, eight thousand, eight hundred eighty".