238023042177157 has 4 divisors (see below), whose sum is σ = 238055661485836. Its totient is φ = 237990422868480.

The previous prime is 238023042177139. The next prime is 238023042177161. The reversal of 238023042177157 is 751771240320832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38725616986081 + 199297425191076 = 6222991^2 + 14117274^2 .

It is a cyclic number.

It is not a de Polignac number, because 238023042177157 - 2²³ = 238023033788549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238023042177127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16309643394 + ... + 16309657987.

It is an arithmetic number, because the mean of its divisors is an integer number (59513915371459).

Almost surely, 2^{238023042177157} is an apocalyptic number.

It is an amenable number.

238023042177157 is a deficient number, since it is larger than the sum of its proper divisors (32619308679).

238023042177157 is an equidigital number, since it uses as much as digits as its factorization.

238023042177157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32619308678.

The product of its (nonzero) digits is 3951360, while the sum is 52.

Adding to 238023042177157 its reverse (751771240320832), we get a palindrome (989794282497989).

The spelling of 238023042177157 in words is "two hundred thirty-eight trillion, twenty-three billion, forty-two million, one hundred seventy-seven thousand, one hundred fifty-seven".