1556332161 has 16 divisors (see below), whose sum is σ = 2237605440. Its totient is φ = 958970880.

The previous prime is 1556332159. The next prime is 1556332177. The reversal of 1556332161 is 1612336551.

It is not a de Polignac number, because 1556332161 - 2¹ = 1556332159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1556332061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330640 + ... + 335313.

It is an arithmetic number, because the mean of its divisors is an integer number (139850340).

Almost surely, 2^1556332161 is an apocalyptic number.

It is an amenable number.

1556332161 is a deficient number, since it is larger than the sum of its proper divisors (681273279).

1556332161 is a wasteful number, since it uses less digits than its factorization.

1556332161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666016.

The product of its digits is 16200, while the sum is 33.

The square root of 1556332161 is about 39450.3759297678. The cubic root of 1556332161 is about 1158.8683377314.

The spelling of 1556332161 in words is "one billion, five hundred fifty-six million, three hundred thirty-two thousand, one hundred sixty-one".