1556228044800 has 2592 divisors, whose sum is σ = 7006053927600. Its totient is φ = 326998425600.

The previous prime is 1556228044753. The next prime is 1556228044831. The reversal of 1556228044800 is 84408226551.

1556228044800 is a `hidden beast` number, since 1 + 5 + 562 + 2 + 8 + 0 + 4 + 4 + 80 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 13771929544 + ... + 13771929656.

Almost surely, 2^{1556228044800} is an apocalyptic number.

1556228044800 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 1556228044800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3503026963800).

1556228044800 is an abundant number, since it is smaller than the sum of its proper divisors (5449825882800).

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

1556228044800 is a wasteful number, since it uses less digits than its factorization.

1556228044800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 1556228044800 in words is "one trillion, five hundred fifty-six billion, two hundred twenty-eight million, forty-four thousand, eight hundred".