42755976173 has 2 divisors, whose sum is σ = 42755976174. Its totient is φ = 42755976172.

The previous prime is 42755976163. The next prime is 42755976199. The reversal of 42755976173 is 37167955724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42270126409 + 485849764 = 205597^2 + 22042^2 .

It is a cyclic number.

It is not a de Polignac number, because 42755976173 - 2¹⁰ = 42755975149 is a prime.

It is a super-2 number, since 2×42755976173² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42755976163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21377988086 + 21377988087.

It is an arithmetic number, because the mean of its divisors is an integer number (21377988087).

Almost surely, 2^42755976173 is an apocalyptic number.

It is an amenable number.

42755976173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42755976173 is an equidigital number, since it uses as much as digits as its factorization.

42755976173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11113200, while the sum is 56.

The spelling of 42755976173 in words is "forty-two billion, seven hundred fifty-five million, nine hundred seventy-six thousand, one hundred seventy-three".