42320240642 has 16 divisors (see below), whose sum is σ = 64035229752. Its totient is φ = 20975606400.

The previous prime is 42320240621. The next prime is 42320240663. The reversal of 42320240642 is 24604202324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42320240621) and next prime (42320240663).

It can be written as a sum of positive squares in 4 ways, for example, as 42119763361 + 200477281 = 205231^2 + 14159^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81908 + ... + 302240.

Almost surely, 2^42320240642 is an apocalyptic number.

42320240642 is a deficient number, since it is larger than the sum of its proper divisors (21714989110).

42320240642 is a wasteful number, since it uses less digits than its factorization.

42320240642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221173.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42320240642 its reverse (24604202324), we get a palindrome (66924442966).

The spelling of 42320240642 in words is "forty-two billion, three hundred twenty million, two hundred forty thousand, six hundred forty-two".