1556005055 has 16 divisors (see below), whose sum is σ = 2038375584. Its totient is φ = 1130849280.

The previous prime is 1556005051. The next prime is 1556005109. The reversal of 1556005055 is 5505006551.

It is not a de Polignac number, because 1556005055 - 2² = 1556005051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556005051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76307 + ... + 94523.

It is an arithmetic number, because the mean of its divisors is an integer number (127398474).

Almost surely, 2^1556005055 is an apocalyptic number.

1556005055 is a deficient number, since it is larger than the sum of its proper divisors (482370529).

1556005055 is a wasteful number, since it uses less digits than its factorization.

1556005055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19786.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 1556005055 is about 39446.2299212485. The cubic root of 1556005055 is about 1158.7871426934.

The spelling of 1556005055 in words is "one billion, five hundred fifty-six million, five thousand, fifty-five".