42364664642 has 4 divisors (see below), whose sum is σ = 63546996966. Its totient is φ = 21182332320.

The previous prime is 42364664603. The next prime is 42364664647. The reversal of 42364664642 is 24646646324.

42364664642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39389943961 + 2974720681 = 198469^2 + 54541^2 .

It is not an unprimeable number, because it can be changed into a prime (42364664647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10591166159 + ... + 10591166162.

Almost surely, 2^42364664642 is an apocalyptic number.

42364664642 is a deficient number, since it is larger than the sum of its proper divisors (21182332324).

42364664642 is a wasteful number, since it uses less digits than its factorization.

42364664642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21182332323.

The product of its digits is 3981312, while the sum is 47.

The spelling of 42364664642 in words is "forty-two billion, three hundred sixty-four million, six hundred sixty-four thousand, six hundred forty-two".