123331642345 has 8 divisors (see below), whose sum is σ = 148126336776. Its totient is φ = 98579736576.

The previous prime is 123331642339. The next prime is 123331642361. The reversal of 123331642345 is 543246133321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17743039209 + 105588603136 = 133203^2 + 324944^2 .

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 123331642345 - 2³³ = 114741707753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10690822 + ... + 10702351.

It is an arithmetic number, because the mean of its divisors is an integer number (18515792097).

Almost surely, 2^123331642345 is an apocalyptic number.

It is an amenable number.

123331642345 is a deficient number, since it is larger than the sum of its proper divisors (24794694431).

123331642345 is a wasteful number, since it uses less digits than its factorization.

123331642345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21394331.

The product of its digits is 155520, while the sum is 37.

Adding to 123331642345 its reverse (543246133321), we get a palindrome (666577775666).

The spelling of 123331642345 in words is "one hundred twenty-three billion, three hundred thirty-one million, six hundred forty-two thousand, three hundred forty-five".