1556445016 has 96 divisors (see below), whose sum is σ = 3481218000. Its totient is φ = 650275584.

The previous prime is 1556444977. The next prime is 1556445017. The reversal of 1556445016 is 6105446551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556445017) 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 23 ways as a sum of consecutive naturals, for example, 4000950 + ... + 4001338.

Almost surely, 2^1556445016 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 1556445016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1740609000).

1556445016 is an abundant number, since it is smaller than the sum of its proper divisors (1924772984).

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

1556445016 is a wasteful number, since it uses less digits than its factorization.

1556445016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 1556445016 is about 39451.8062450884. The cubic root of 1556445016 is about 1158.8963482313.

The spelling of 1556445016 in words is "one billion, five hundred fifty-six million, four hundred forty-five thousand, sixteen".