642380562108 has 144 divisors (see below), whose sum is σ = 1681233345792. Its totient is φ = 206676000000.

The previous prime is 642380562101. The next prime is 642380562133. The reversal of 642380562108 is 801265083246.

642380562108 is a `hidden beast` number, since 6 + 4 + 2 + 3 + 80 + 562 + 1 + 0 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642380562101) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 55936135 + ... + 55947617.

It is an arithmetic number, because the mean of its divisors is an integer number (11675231568).

Almost surely, 2^642380562108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642380562108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840616672896).

642380562108 is an abundant number, since it is smaller than the sum of its proper divisors (1038852783684).

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

642380562108 is a wasteful number, since it uses less digits than its factorization.

642380562108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11936 (or 11931 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 642380562108 in words is "six hundred forty-two billion, three hundred eighty million, five hundred sixty-two thousand, one hundred eight".