642444365487 has 8 divisors (see below), whose sum is σ = 856723271040. Its totient is φ = 428230851800.

The previous prime is 642444365461. The next prime is 642444365503. The reversal of 642444365487 is 784563444246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642444365487 - 2⁷ = 642444365359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642444365417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16325037 + ... + 16364342.

It is an arithmetic number, because the mean of its divisors is an integer number (107090408880).

Almost surely, 2^642444365487 is an apocalyptic number.

642444365487 is a deficient number, since it is larger than the sum of its proper divisors (214278905553).

642444365487 is a wasteful number, since it uses less digits than its factorization.

642444365487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32695933.

The product of its digits is 61931520, while the sum is 57.

The spelling of 642444365487 in words is "six hundred forty-two billion, four hundred forty-four million, three hundred sixty-five thousand, four hundred eighty-seven".