642838636101 has 8 divisors (see below), whose sum is σ = 857140147744. Its totient is φ = 428548107600.

The previous prime is 642838636039. The next prime is 642838636127. The reversal of 642838636101 is 101636838246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642838636101 - 2¹³ = 642838627909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642838636501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2608231 + ... + 2844036.

It is an arithmetic number, because the mean of its divisors is an integer number (107142518468).

Almost surely, 2^642838636101 is an apocalyptic number.

It is an amenable number.

642838636101 is a deficient number, since it is larger than the sum of its proper divisors (214301511643).

642838636101 is a wasteful number, since it uses less digits than its factorization.

642838636101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491571.

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 642838636101 in words is "six hundred forty-two billion, eight hundred thirty-eight million, six hundred thirty-six thousand, one hundred one".