42640066464 has 24 divisors (see below), whose sum is σ = 111930174720. Its totient is φ = 14213355456.

The previous prime is 42640066429. The next prime is 42640066477. The reversal of 42640066464 is 46466004624.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 222083584 + ... + 222083775.

It is an arithmetic number, because the mean of its divisors is an integer number (4663757280).

Almost surely, 2^42640066464 is an apocalyptic number.

It is an amenable number.

42640066464 is an abundant number, since it is smaller than the sum of its proper divisors (69290108256).

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

42640066464 is a wasteful number, since it uses less digits than its factorization.

42640066464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444167372 (or 444167364 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 42640066464 in words is "forty-two billion, six hundred forty million, sixty-six thousand, four hundred sixty-four".