238128652385 has 12 divisors (see below), whose sum is σ = 307740573588. Its totient is φ = 175845945696.

The previous prime is 238128652357. The next prime is 238128652409. The reversal of 238128652385 is 583256821832.

It can be written as a sum of positive squares in 2 ways, for example, as 58616283664 + 179512368721 = 242108^2 + 423689^2 .

It is not a de Polignac number, because 238128652385 - 2²⁰ = 238127603809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3903992 + ... + 3964518.

It is an arithmetic number, because the mean of its divisors is an integer number (25645047799).

Almost surely, 2^238128652385 is an apocalyptic number.

It is an amenable number.

238128652385 is a deficient number, since it is larger than the sum of its proper divisors (69611921203).

238128652385 is an frugal number, since it uses more digits than its factorization.

238128652385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121072 (or 60545 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 53.

The spelling of 238128652385 in words is "two hundred thirty-eight billion, one hundred twenty-eight million, six hundred fifty-two thousand, three hundred eighty-five".