42161394129 has 8 divisors (see below), whose sum is σ = 56730928320. Its totient is φ = 27849728016.

The previous prime is 42161394071. The next prime is 42161394131. The reversal of 42161394129 is 92149316124.

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

It is not a de Polignac number, because 42161394129 - 2¹⁷ = 42161263057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42161394229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64466637 + ... + 64467290.

It is an arithmetic number, because the mean of its divisors is an integer number (7091366040).

Almost surely, 2^42161394129 is an apocalyptic number.

It is an amenable number.

42161394129 is a deficient number, since it is larger than the sum of its proper divisors (14569534191).

42161394129 is a wasteful number, since it uses less digits than its factorization.

42161394129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128934039.

The product of its digits is 93312, while the sum is 42.

The spelling of 42161394129 in words is "forty-two billion, one hundred sixty-one million, three hundred ninety-four thousand, one hundred twenty-nine".