1556005005151 has 4 divisors (see below), whose sum is σ = 1582377971400. Its totient is φ = 1529632038904.

The previous prime is 1556005005143. The next prime is 1556005005199. The reversal of 1556005005151 is 1515005006551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1556005005151 - 2³ = 1556005005143 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 (1556005003151) 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 3 ways as a sum of consecutive naturals, for example, 13186483036 + ... + 13186483153.

It is an arithmetic number, because the mean of its divisors is an integer number (395594492850).

Almost surely, 2^{1556005005151} is an apocalyptic number.

1556005005151 is a deficient number, since it is larger than the sum of its proper divisors (26372966249).

1556005005151 is an equidigital number, since it uses as much as digits as its factorization.

1556005005151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26372966248.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 1556005005151 in words is "one trillion, five hundred fifty-six billion, five million, five thousand, one hundred fifty-one".