642605220314 has 4 divisors (see below), whose sum is σ = 963907830474. Its totient is φ = 321302610156.

The previous prime is 642605220289. The next prime is 642605220319. The reversal of 642605220314 is 413022506246.

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., 642589814689 + 15405625 = 801617^2 + 3925^2 .

It is not an unprimeable number, because it can be changed into a prime (642605220319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160651305077 + ... + 160651305080.

Almost surely, 2^642605220314 is an apocalyptic number.

642605220314 is a deficient number, since it is larger than the sum of its proper divisors (321302610160).

642605220314 is a wasteful number, since it uses less digits than its factorization.

642605220314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321302610159.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 642605220314 in words is "six hundred forty-two billion, six hundred five million, two hundred twenty thousand, three hundred fourteen".