162556325521 has 4 divisors (see below), whose sum is σ = 169623991872. Its totient is φ = 155488659172.

The previous prime is 162556325461. The next prime is 162556325551. The reversal of 162556325521 is 125523655261.

162556325521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125523655261 = 89 ⋅1410378149.

It is a cyclic number.

It is not a de Polignac number, because 162556325521 - 2¹⁵ = 162556292753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162556325551) 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, 3533833141 + ... + 3533833186.

It is an arithmetic number, because the mean of its divisors is an integer number (42405997968).

Almost surely, 2^162556325521 is an apocalyptic number.

It is an amenable number.

162556325521 is a deficient number, since it is larger than the sum of its proper divisors (7067666351).

162556325521 is an equidigital number, since it uses as much as digits as its factorization.

162556325521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067666350.

The product of its digits is 540000, while the sum is 43.

The spelling of 162556325521 in words is "one hundred sixty-two billion, five hundred fifty-six million, three hundred twenty-five thousand, five hundred twenty-one".