42942581384 has 16 divisors (see below), whose sum is σ = 81837297420. Its totient is φ = 21119302080.

The previous prime is 42942581377. The next prime is 42942581387. The reversal of 42942581384 is 48318524924.

It can be written as a sum of positive squares in 2 ways, for example, as 42679428100 + 263153284 = 206590^2 + 16222^2 .

It is not an unprimeable number, because it can be changed into a prime (42942581387) 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, 43998059 + ... + 43999034.

Almost surely, 2^42942581384 is an apocalyptic number.

It is an amenable number.

42942581384 is a deficient number, since it is larger than the sum of its proper divisors (38894716036).

42942581384 is a wasteful number, since it uses less digits than its factorization.

42942581384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87997160 (or 87997156 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 50.

The spelling of 42942581384 in words is "forty-two billion, nine hundred forty-two million, five hundred eighty-one thousand, three hundred eighty-four".