1556441145 has 144 divisors (see below), whose sum is σ = 3346237440. Its totient is φ = 665376768.

The previous prime is 1556441141. The next prime is 1556441147. The reversal of 1556441145 is 5411446551.

1556441145 is a `hidden beast` number, since 1 + 5 + 5 + 644 + 1 + 1 + 4 + 5 = 666.

It is not a de Polignac number, because 1556441145 - 2² = 1556441141 is a prime.

It is a super-2 number, since 2×1556441145² = 4845018075697822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1556441141) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4063624 + ... + 4064006.

It is an arithmetic number, because the mean of its divisors is an integer number (23237760).

Almost surely, 2^1556441145 is an apocalyptic number.

1556441145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1556441145 is an abundant number, since it is smaller than the sum of its proper divisors (1789796295).

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

1556441145 is a wasteful number, since it uses less digits than its factorization.

1556441145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 514 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 1556441145 is about 39451.7571852003. The cubic root of 1556441145 is about 1158.8953874753.

Adding to 1556441145 its reverse (5411446551), we get a palindrome (6967887696).

The spelling of 1556441145 in words is "one billion, five hundred fifty-six million, four hundred forty-one thousand, one hundred forty-five".