642074118 has 64 divisors (see below), whose sum is σ = 1560425472. Its totient is φ = 172149120.

The previous prime is 642074107. The next prime is 642074129. The reversal of 642074118 is 811470246.

It is an interprime number because it is at equal distance from previous prime (642074107) and next prime (642074129).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44928 + ... + 57468.

It is an arithmetic number, because the mean of its divisors is an integer number (24381648).

Almost surely, 2^642074118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642074118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780212736).

642074118 is an abundant number, since it is smaller than the sum of its proper divisors (918351354).

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

642074118 is a wasteful number, since it uses less digits than its factorization.

642074118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12629.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 642074118 is about 25339.1814784929. The cubic root of 642074118 is about 862.7038204297.

The spelling of 642074118 in words is "six hundred forty-two million, seventy-four thousand, one hundred eighteen".