1556941163 has 2 divisors, whose sum is σ = 1556941164. Its totient is φ = 1556941162.

The previous prime is 1556941151. The next prime is 1556941171. The reversal of 1556941163 is 3611496551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1556941163 - 2²⁶ = 1489832299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1556941163.

It is not a weakly prime, because it can be changed into another prime (1556941123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778470581 + 778470582.

It is an arithmetic number, because the mean of its divisors is an integer number (778470582).

Almost surely, 2^1556941163 is an apocalyptic number.

1556941163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556941163 is an equidigital number, since it uses as much as digits as its factorization.

1556941163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 1556941163 is about 39458.0937578084. The cubic root of 1556941163 is about 1159.0194753694.

The spelling of 1556941163 in words is "one billion, five hundred fifty-six million, nine hundred forty-one thousand, one hundred sixty-three".