161552525827 has 48 divisors (see below), whose sum is σ = 209205241344. Its totient is φ = 123333840000.

The previous prime is 161552525789. The next prime is 161552525839. The reversal of 161552525827 is 728525255161.

It is a happy number.

161552525827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-161552525827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (161552525887) 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 47 ways as a sum of consecutive naturals, for example, 5927802 + ... + 5954992.

It is an arithmetic number, because the mean of its divisors is an integer number (4358442528).

Almost surely, 2^161552525827 is an apocalyptic number.

161552525827 is a deficient number, since it is larger than the sum of its proper divisors (47652715517).

161552525827 is a wasteful number, since it uses less digits than its factorization.

161552525827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27440 (or 27433 counting only the distinct ones).

The product of its digits is 1680000, while the sum is 49.

The spelling of 161552525827 in words is "one hundred sixty-one billion, five hundred fifty-two million, five hundred twenty-five thousand, eight hundred twenty-seven".