238762631561 has 8 divisors (see below), whose sum is σ = 242701517448. Its totient is φ = 234824544000.

The previous prime is 238762631557. The next prime is 238762631587. The reversal of 238762631561 is 165136267832.

It can be written as a sum of positive squares in 4 ways, for example, as 28397305225 + 210365326336 = 168515^2 + 458656^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238762631561 - 2² = 238762631557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238762636561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419201 + ... + 808241.

It is an arithmetic number, because the mean of its divisors is an integer number (30337689681).

Almost surely, 2^238762631561 is an apocalyptic number.

It is an amenable number.

238762631561 is a deficient number, since it is larger than the sum of its proper divisors (3938885887).

238762631561 is a wasteful number, since it uses less digits than its factorization.

238762631561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399163.

The product of its digits is 2177280, while the sum is 50.

The spelling of 238762631561 in words is "two hundred thirty-eight billion, seven hundred sixty-two million, six hundred thirty-one thousand, five hundred sixty-one".