123183342581 has 16 divisors (see below), whose sum is σ = 133972312320. Its totient is φ = 112583494080.

The previous prime is 123183342563. The next prime is 123183342629. The reversal of 123183342581 is 185243381321.

It is a cyclic number.

It is not a de Polignac number, because 123183342581 - 2¹⁴ = 123183326197 is a prime.

It is a super-2 number, since 2×123183342581² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123183342511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1985846 + ... + 2046936.

It is an arithmetic number, because the mean of its divisors is an integer number (8373269520).

Almost surely, 2^123183342581 is an apocalyptic number.

It is an amenable number.

123183342581 is a deficient number, since it is larger than the sum of its proper divisors (10788969739).

123183342581 is a wasteful number, since it uses less digits than its factorization.

123183342581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62636.

The product of its digits is 138240, while the sum is 41.

The spelling of 123183342581 in words is "one hundred twenty-three billion, one hundred eighty-three million, three hundred forty-two thousand, five hundred eighty-one".