161042325501 has 16 divisors (see below), whose sum is σ = 216353523200. Its totient is φ = 106548248880.

The previous prime is 161042325491. The next prime is 161042325529. The reversal of 161042325501 is 105523240161.

It is not a de Polignac number, because 161042325501 - 2¹⁹ = 161041801213 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 (161042321501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99600 + ... + 576198.

It is an arithmetic number, because the mean of its divisors is an integer number (13522095200).

Almost surely, 2^161042325501 is an apocalyptic number.

It is an amenable number.

161042325501 is a deficient number, since it is larger than the sum of its proper divisors (55311197699).

161042325501 is a wasteful number, since it uses less digits than its factorization.

161042325501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477456.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 161042325501 its reverse (105523240161), we get a palindrome (266565565662).

The spelling of 161042325501 in words is "one hundred sixty-one billion, forty-two million, three hundred twenty-five thousand, five hundred one".