42218742784 has 33 divisors (see below), whose sum is σ = 84409402161. Its totient is φ = 21106083840.

The previous prime is 42218742743. The next prime is 42218742791. The reversal of 42218742784 is 48724781224.

The square root of 42218742784 is 205472.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11691664384 + 30527078400 = 108128^2 + 174720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6571894 + ... + 6578314.

Almost surely, 2^42218742784 is an apocalyptic number.

42218742784 is the 205472-nd square number.

It is an amenable number.

42218742784 is a deficient number, since it is larger than the sum of its proper divisors (42190659377).

42218742784 is an frugal number, since it uses more digits than its factorization.

42218742784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12862 (or 6423 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 49.

Multiplying 42218742784 by its sum of digits (49), we get a square (2068718396416 = 1438304²).

The spelling of 42218742784 in words is "forty-two billion, two hundred eighteen million, seven hundred forty-two thousand, seven hundred eighty-four".