642849592020 has 48 divisors (see below), whose sum is σ = 1801099214208. Its totient is φ = 171319857280.

The previous prime is 642849592009. The next prime is 642849592069. The reversal of 642849592020 is 20295948246.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3237171 + ... + 3430010.

It is an arithmetic number, because the mean of its divisors is an integer number (37522900296).

Almost surely, 2^642849592020 is an apocalyptic number.

642849592020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642849592020 is an abundant number, since it is smaller than the sum of its proper divisors (1158249622188).

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

642849592020 is a wasteful number, since it uses less digits than its factorization.

642849592020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668800 (or 6668798 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 642849592020 in words is "six hundred forty-two billion, eight hundred forty-nine million, five hundred ninety-two thousand, twenty".