642710056 has 16 divisors (see below), whose sum is σ = 1205493300. Its totient is φ = 321245184.

The previous prime is 642710053. The next prime is 642710059. The reversal of 642710056 is 650017246.

It is a happy number.

642710056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642710053) and next prime (642710059).

It can be written as a sum of positive squares in 2 ways, for example, as 638572900 + 4137156 = 25270^2 + 2034^2 .

It is not an unprimeable number, because it can be changed into a prime (642710053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14566 + ... + 38698.

Almost surely, 2^642710056 is an apocalyptic number.

It is an amenable number.

642710056 is a deficient number, since it is larger than the sum of its proper divisors (562783244).

642710056 is a wasteful number, since it uses less digits than its factorization.

642710056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27468 (or 27464 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 642710056 is about 25351.7268839817. The cubic root of 642710056 is about 862.9885461847.

The spelling of 642710056 in words is "six hundred forty-two million, seven hundred ten thousand, fifty-six".