238718066475644 has 144 divisors (see below), whose sum is σ = 515571279955200. Its totient is φ = 94695779261952.

The previous prime is 238718066475607. The next prime is 238718066475659. The reversal of 238718066475644 is 446574660817832.

238718066475644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95980772 + ... + 98436500.

It is an arithmetic number, because the mean of its divisors is an integer number (3580356110800).

Almost surely, 2^{238718066475644} 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 238718066475644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257785639977600).

238718066475644 is an abundant number, since it is smaller than the sum of its proper divisors (276853213479556).

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

238718066475644 is a wasteful number, since it uses less digits than its factorization.

238718066475644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456000 (or 2455979 counting only the distinct ones).

The product of its (nonzero) digits is 1300561920, while the sum is 71.

The spelling of 238718066475644 in words is "two hundred thirty-eight trillion, seven hundred eighteen billion, sixty-six million, four hundred seventy-five thousand, six hundred forty-four".