642670652286 has 24 divisors (see below), whose sum is σ = 1499564855880. Its totient is φ = 197744816016.

The previous prime is 642670652251. The next prime is 642670652291. The reversal of 642670652286 is 682256076246.

It is a happy number.

642670652286 is a `hidden beast` number, since 6 + 42 + 6 + 70 + 6 + 522 + 8 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1373227656 + ... + 1373228123.

It is an arithmetic number, because the mean of its divisors is an integer number (62481868995).

Almost surely, 2^642670652286 is an apocalyptic number.

642670652286 is an abundant number, since it is smaller than the sum of its proper divisors (856894203594).

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

642670652286 is a wasteful number, since it uses less digits than its factorization.

642670652286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746455800 (or 2746455797 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 642670652286 in words is "six hundred forty-two billion, six hundred seventy million, six hundred fifty-two thousand, two hundred eighty-six".