642868845480 has 128 divisors (see below), whose sum is σ = 2268948931200. Its totient is φ = 161347470336.

The previous prime is 642868845473. The next prime is 642868845559. The reversal of 642868845480 is 84548868246.

642868845480 is a `hidden beast` number, since 6 + 4 + 2 + 8 + 6 + 8 + 84 + 548 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17488962 + ... + 17525681.

It is an arithmetic number, because the mean of its divisors is an integer number (17726163525).

Almost surely, 2^642868845480 is an apocalyptic number.

642868845480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642868845480 is an abundant number, since it is smaller than the sum of its proper divisors (1626080085720).

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

642868845480 is a wasteful number, since it uses less digits than its factorization.

642868845480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35014680 (or 35014670 counting only the distinct ones).

The product of its (nonzero) digits is 94371840, while the sum is 63.

The spelling of 642868845480 in words is "six hundred forty-two billion, eight hundred sixty-eight million, eight hundred forty-five thousand, four hundred eighty".