642635050 has 12 divisors (see below), whose sum is σ = 1195301286. Its totient is φ = 257054000.

The previous prime is 642635033. The next prime is 642635051. The reversal of 642635050 is 50536246.

642635050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 547045321 + 95589729 = 23389^2 + 9777^2 .

It is not an unprimeable number, because it can be changed into a prime (642635051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6426301 + ... + 6426400.

Almost surely, 2^642635050 is an apocalyptic number.

642635050 is a deficient number, since it is larger than the sum of its proper divisors (552666236).

642635050 is a wasteful number, since it uses less digits than its factorization.

642635050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12852713 (or 12852708 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 642635050 is about 25350.2475333082. The cubic root of 642635050 is about 862.9549738470.

The spelling of 642635050 in words is "six hundred forty-two million, six hundred thirty-five thousand, fifty".