42435532161 has 96 divisors (see below), whose sum is σ = 69531291648. Its totient is φ = 24718648320.

The previous prime is 42435532147. The next prime is 42435532169. The reversal of 42435532161 is 16123553424.

42435532161 is a `hidden beast` number, since 4 + 2 + 43 + 553 + 2 + 1 + 61 = 666.

It is not a de Polignac number, because 42435532161 - 2¹⁰ = 42435531137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42435532169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 75373666 + ... + 75374228.

It is an arithmetic number, because the mean of its divisors is an integer number (724284288).

Almost surely, 2^42435532161 is an apocalyptic number.

It is an amenable number.

42435532161 is a deficient number, since it is larger than the sum of its proper divisors (27095759487).

42435532161 is a wasteful number, since it uses less digits than its factorization.

42435532161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 888 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 42435532161 in words is "forty-two billion, four hundred thirty-five million, five hundred thirty-two thousand, one hundred sixty-one".