238242435661 has 4 divisors (see below), whose sum is σ = 238245942172. Its totient is φ = 238238929152.

The previous prime is 238242435617. The next prime is 238242435667. The reversal of 238242435661 is 166534242832.

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 220853002500 + 17389433161 = 469950^2 + 131869^2 .

It is a cyclic number.

It is not a de Polignac number, because 238242435661 - 2¹³ = 238242427469 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 (238242435667) 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, 1649286 + ... + 1787911.

It is an arithmetic number, because the mean of its divisors is an integer number (59561485543).

Almost surely, 2^238242435661 is an apocalyptic number.

It is an amenable number.

238242435661 is a deficient number, since it is larger than the sum of its proper divisors (3506511).

238242435661 is an equidigital number, since it uses as much as digits as its factorization.

238242435661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506510.

The product of its digits is 1658880, while the sum is 46.

The spelling of 238242435661 in words is "two hundred thirty-eight billion, two hundred forty-two million, four hundred thirty-five thousand, six hundred sixty-one".