642016552 has 16 divisors (see below), whose sum is σ = 1207013940. Its totient is φ = 320146176.

The previous prime is 642016511. The next prime is 642016553. The reversal of 642016552 is 255610246.

It can be written as a sum of positive squares in 2 ways, for example, as 564822756 + 77193796 = 23766^2 + 8786^2 .

It is not an unprimeable number, because it can be changed into a prime (642016553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104593 + ... + 110560.

Almost surely, 2^642016552 is an apocalyptic number.

It is an amenable number.

642016552 is a deficient number, since it is larger than the sum of its proper divisors (564997388).

642016552 is a wasteful number, since it uses less digits than its factorization.

642016552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215532 (or 215528 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 642016552 is about 25338.0455442009. The cubic root of 642016552 is about 862.6780373771.

Adding to 642016552 its reverse (255610246), we get a palindrome (897626798).

The spelling of 642016552 in words is "six hundred forty-two million, sixteen thousand, five hundred fifty-two".