42173218371647 has 6 divisors (see below), whose sum is σ = 46355686309464. Its totient is φ = 38339289428660.

The previous prime is 42173218371601. The next prime is 42173218371727. The reversal of 42173218371647 is 74617381237124.

It is not a de Polignac number, because 42173218371647 - 2¹² = 42173218367551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42173218371592 and 42173218371601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42173218361647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174269497283 + ... + 174269497524.

It is an arithmetic number, because the mean of its divisors is an integer number (7725947718244).

Almost surely, 2^{42173218371647} is an apocalyptic number.

42173218371647 is a deficient number, since it is larger than the sum of its proper divisors (4182467937817).

42173218371647 is a wasteful number, since it uses less digits than its factorization.

42173218371647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348538994829 (or 348538994818 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 56.

The spelling of 42173218371647 in words is "forty-two trillion, one hundred seventy-three billion, two hundred eighteen million, three hundred seventy-one thousand, six hundred forty-seven".