642463455602 has 4 divisors (see below), whose sum is σ = 963695183406. Its totient is φ = 321231727800.

The previous prime is 642463455509. The next prime is 642463455637. The reversal of 642463455602 is 206554364246.

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., 325596913321 + 316866542281 = 570611^2 + 562909^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160615863899 + ... + 160615863902.

Almost surely, 2^642463455602 is an apocalyptic number.

642463455602 is a deficient number, since it is larger than the sum of its proper divisors (321231727804).

642463455602 is a wasteful number, since it uses less digits than its factorization.

642463455602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321231727803.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 642463455602 in words is "six hundred forty-two billion, four hundred sixty-three million, four hundred fifty-five thousand, six hundred two".