161526165553 has 8 divisors (see below), whose sum is σ = 166657046400. Its totient is φ = 156472441008.

The previous prime is 161526165551. The next prime is 161526165571. The reversal of 161526165553 is 355561625161.

161526165553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161526165553 - 2¹ = 161526165551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161526165551) 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 7 ways as a sum of consecutive naturals, for example, 19284823 + ... + 19293196.

It is an arithmetic number, because the mean of its divisors is an integer number (20832130800).

Almost surely, 2^161526165553 is an apocalyptic number.

It is an amenable number.

161526165553 is a deficient number, since it is larger than the sum of its proper divisors (5130880847).

161526165553 is an equidigital number, since it uses as much as digits as its factorization.

161526165553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38578151.

The product of its digits is 810000, while the sum is 46.

The spelling of 161526165553 in words is "one hundred sixty-one billion, five hundred twenty-six million, one hundred sixty-five thousand, five hundred fifty-three".