642028244454 has 48 divisors (see below), whose sum is σ = 1452355164000. Its totient is φ = 204589997568.

The previous prime is 642028244453. The next prime is 642028244489. The reversal of 642028244454 is 454442820246.

642028244454 is a `hidden beast` number, since 64 + 20 + 2 + 82 + 44 + 454 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642028244453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307222 + ... + 1174070.

It is an arithmetic number, because the mean of its divisors is an integer number (30257399250).

Almost surely, 2^642028244454 is an apocalyptic number.

642028244454 is an abundant number, since it is smaller than the sum of its proper divisors (810326919546).

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

642028244454 is a wasteful number, since it uses less digits than its factorization.

642028244454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868669 (or 868666 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 45.

The spelling of 642028244454 in words is "six hundred forty-two billion, twenty-eight million, two hundred forty-four thousand, four hundred fifty-four".