1556464163 has 12 divisors (see below), whose sum is σ = 1636642368. Its totient is φ = 1479114000.

The previous prime is 1556464153. The next prime is 1556464187. The reversal of 1556464163 is 3614646551.

It is not a de Polignac number, because 1556464163 - 2¹⁸ = 1556202019 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1556464163.

It is not an unprimeable number, because it can be changed into a prime (1556464123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57038 + ... + 79788.

It is an arithmetic number, because the mean of its divisors is an integer number (136386864).

Almost surely, 2^1556464163 is an apocalyptic number.

1556464163 is a deficient number, since it is larger than the sum of its proper divisors (80178205).

1556464163 is an equidigital number, since it uses as much as digits as its factorization.

1556464163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22874 (or 22831 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 1556464163 is about 39452.0489075029. The cubic root of 1556464163 is about 1158.9011003635.

The spelling of 1556464163 in words is "one billion, five hundred fifty-six million, four hundred sixty-four thousand, one hundred sixty-three".