642573454782 has 128 divisors (see below), whose sum is σ = 1510083348480. Its totient is φ = 178498805760.

The previous prime is 642573454777. The next prime is 642573454813. The reversal of 642573454782 is 287454375246.

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 (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 399361194 + ... + 399362802.

It is an arithmetic number, because the mean of its divisors is an integer number (11797526160).

Almost surely, 2^642573454782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642573454782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755041674240).

642573454782 is an abundant number, since it is smaller than the sum of its proper divisors (867509893698).

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

642573454782 is a wasteful number, since it uses less digits than its factorization.

642573454782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386.

The product of its digits is 45158400, while the sum is 57.

The spelling of 642573454782 in words is "six hundred forty-two billion, five hundred seventy-three million, four hundred fifty-four thousand, seven hundred eighty-two".