642060206406 has 12 divisors (see below), whose sum is σ = 1391130447252. Its totient is φ = 214020068796.

The previous prime is 642060206399. The next prime is 642060206407. The reversal of 642060206406 is 604602060246.

642060206406 is a `hidden beast` number, since 6 + 4 + 2 + 0 + 6 + 0 + 2 + 0 + 640 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642060206407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17835005716 + ... + 17835005751.

It is an arithmetic number, because the mean of its divisors is an integer number (115927537271).

Almost surely, 2^642060206406 is an apocalyptic number.

642060206406 is an abundant number, since it is smaller than the sum of its proper divisors (749070240846).

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

642060206406 is a wasteful number, since it uses less digits than its factorization.

642060206406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35670011475 (or 35670011472 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 642060206406 in words is "six hundred forty-two billion, sixty million, two hundred six thousand, four hundred six".