642286439630 has 16 divisors (see below), whose sum is σ = 1261217008944. Its totient is φ = 233558705280.

The previous prime is 642286439623. The next prime is 642286439681. The reversal of 642286439630 is 36934682246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2919483707 + ... + 2919483926.

It is an arithmetic number, because the mean of its divisors is an integer number (78826063059).

Almost surely, 2^642286439630 is an apocalyptic number.

642286439630 is a deficient number, since it is larger than the sum of its proper divisors (618930569314).

642286439630 is a wasteful number, since it uses less digits than its factorization.

642286439630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838967651.

The product of its (nonzero) digits is 8957952, while the sum is 53.

The spelling of 642286439630 in words is "six hundred forty-two billion, two hundred eighty-six million, four hundred thirty-nine thousand, six hundred thirty".