42497170161 has 16 divisors (see below), whose sum is σ = 57427671168. Its totient is φ = 27951056000.

The previous prime is 42497170159. The next prime is 42497170171. The reversal of 42497170161 is 16107179424.

It is a cyclic number.

It is not a de Polignac number, because 42497170161 - 2¹ = 42497170159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42497170151) 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 15 ways as a sum of consecutive naturals, for example, 164421 + ... + 334706.

It is an arithmetic number, because the mean of its divisors is an integer number (3589229448).

Almost surely, 2^42497170161 is an apocalyptic number.

It is an amenable number.

42497170161 is a deficient number, since it is larger than the sum of its proper divisors (14930501007).

42497170161 is a wasteful number, since it uses less digits than its factorization.

42497170161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499512.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 42497170161 in words is "forty-two billion, four hundred ninety-seven million, one hundred seventy thousand, one hundred sixty-one".