642460606064 has 10 divisors (see below), whose sum is σ = 1244767424280. Its totient is φ = 321230303024.

The previous prime is 642460606043. The next prime is 642460606079. The reversal of 642460606064 is 460606064246.

642460606064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20076893924 + ... + 20076893955.

It is an arithmetic number, because the mean of its divisors is an integer number (124476742428).

Almost surely, 2^642460606064 is an apocalyptic number.

It is an amenable number.

642460606064 is a deficient number, since it is larger than the sum of its proper divisors (602306818216).

642460606064 is a wasteful number, since it uses less digits than its factorization.

642460606064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40153787887 (or 40153787881 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 642460606064 in words is "six hundred forty-two billion, four hundred sixty million, six hundred six thousand, sixty-four".