42861078173 has 4 divisors (see below), whose sum is σ = 42946289568. Its totient is φ = 42775866780.

The previous prime is 42861078121. The next prime is 42861078187. The reversal of 42861078173 is 37187016824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42861078173 - 2¹⁸ = 42860816029 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 (42861078103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42604943 + ... + 42605948.

It is an arithmetic number, because the mean of its divisors is an integer number (10736572392).

Almost surely, 2^42861078173 is an apocalyptic number.

It is an amenable number.

42861078173 is a deficient number, since it is larger than the sum of its proper divisors (85211395).

42861078173 is an equidigital number, since it uses as much as digits as its factorization.

42861078173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85211394.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 42861078173 in words is "forty-two billion, eight hundred sixty-one million, seventy-eight thousand, one hundred seventy-three".