642886688246 has 24 divisors (see below), whose sum is σ = 1094158535232. Its totient is φ = 282794727600.

The previous prime is 642886688233. The next prime is 642886688281.

It is a happy number.

642886688246 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42840185 + ... + 42855188.

It is an arithmetic number, because the mean of its divisors is an integer number (45589938968).

Almost surely, 2^642886688246 is an apocalyptic number.

642886688246 is a deficient number, since it is larger than the sum of its proper divisors (451271846986).

642886688246 is a wasteful number, since it uses less digits than its factorization.

642886688246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85695428 (or 85695417 counting only the distinct ones).

The product of its digits is 339738624, while the sum is 68.

The spelling of 642886688246 in words is "six hundred forty-two billion, eight hundred eighty-six million, six hundred eighty-eight thousand, two hundred forty-six".