642536461606 has 16 divisors (see below), whose sum is σ = 1038169201104. Its totient is φ = 296490808224.

The previous prime is 642536461591. The next prime is 642536461613. The reversal of 642536461606 is 606164635246.

It is a self number, because there is not a number n which added to its sum of digits gives 642536461606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2564761 + ... + 2804116.

It is an arithmetic number, because the mean of its divisors is an integer number (64885575069).

Almost surely, 2^642536461606 is an apocalyptic number.

642536461606 is a deficient number, since it is larger than the sum of its proper divisors (395632739498).

642536461606 is a wasteful number, since it uses less digits than its factorization.

642536461606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373495.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 642536461606 in words is "six hundred forty-two billion, five hundred thirty-six million, four hundred sixty-one thousand, six hundred six".