42173218371727 has 2 divisors, whose sum is σ = 42173218371728. Its totient is φ = 42173218371726.

The previous prime is 42173218371601. The next prime is 42173218371731. The reversal of 42173218371727 is 72717381237124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42173218371727 - 2¹¹ = 42173218369679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42173218371797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21086609185863 + 21086609185864.

It is an arithmetic number, because the mean of its divisors is an integer number (21086609185864).

Almost surely, 2^{42173218371727} is an apocalyptic number.

42173218371727 is a deficient number, since it is larger than the sum of its proper divisors (1).

42173218371727 is an equidigital number, since it uses as much as digits as its factorization.

42173218371727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5531904, while the sum is 55.

The spelling of 42173218371727 in words is "forty-two trillion, one hundred seventy-three billion, two hundred eighteen million, three hundred seventy-one thousand, seven hundred twenty-seven".