642484650720 has 96 divisors (see below), whose sum is σ = 2207810908800. Its totient is φ = 155753853440.

The previous prime is 642484650713. The next prime is 642484650739. The reversal of 642484650720 is 27056484246.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 642484650720.

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 15 ways as a sum of consecutive naturals, for example, 60836070 + ... + 60846629.

It is an arithmetic number, because the mean of its divisors is an integer number (22998030300).

Almost surely, 2^642484650720 is an apocalyptic number.

642484650720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642484650720 is an abundant number, since it is smaller than the sum of its proper divisors (1565326258080).

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

642484650720 is a wasteful number, since it uses less digits than its factorization.

642484650720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121682728 (or 121682720 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 48.

The spelling of 642484650720 in words is "six hundred forty-two billion, four hundred eighty-four million, six hundred fifty thousand, seven hundred twenty".