238640713165 has 16 divisors (see below), whose sum is σ = 303290251200. Its totient is φ = 179754930432.

The previous prime is 238640713139. The next prime is 238640713193. The reversal of 238640713165 is 561317046832.

It is a cyclic number.

It is not a de Polignac number, because 238640713165 - 2¹⁹ = 238640188877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7690060 + ... + 7721029.

It is an arithmetic number, because the mean of its divisors is an integer number (18955640700).

Almost surely, 2^238640713165 is an apocalyptic number.

It is an amenable number.

238640713165 is a deficient number, since it is larger than the sum of its proper divisors (64649538035).

238640713165 is a wasteful number, since it uses less digits than its factorization.

238640713165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15411276.

The product of its (nonzero) digits is 725760, while the sum is 46.

Adding to 238640713165 its reverse (561317046832), we get a palindrome (799957759997).

The spelling of 238640713165 in words is "two hundred thirty-eight billion, six hundred forty million, seven hundred thirteen thousand, one hundred sixty-five".