642105002706 has 16 divisors (see below), whose sum is σ = 1284467267424. Its totient is φ = 213992123904.

The previous prime is 642105002663. The next prime is 642105002723. The reversal of 642105002706 is 607200501246.

It is a Curzon 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, 10686796 + ... + 10746711.

It is an arithmetic number, because the mean of its divisors is an integer number (80279204214).

Almost surely, 2^642105002706 is an apocalyptic number.

642105002706 is an abundant number, since it is smaller than the sum of its proper divisors (642362264718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642105002706 is a wasteful number, since it uses less digits than its factorization.

642105002706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21438505.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 642105002706 in words is "six hundred forty-two billion, one hundred five million, two thousand, seven hundred six".