123130556065 has 8 divisors (see below), whose sum is σ = 161189091648. Its totient is φ = 89549495280.

The previous prime is 123130556063. The next prime is 123130556083. The reversal of 123130556065 is 560655031321.

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

It is not a de Polignac number, because 123130556065 - 2¹ = 123130556063 is a prime.

It is a super-2 number, since 2×123130556065² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123130556063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119368637 + ... + 1119368746.

It is an arithmetic number, because the mean of its divisors is an integer number (20148636456).

Almost surely, 2^123130556065 is an apocalyptic number.

It is an amenable number.

123130556065 is a deficient number, since it is larger than the sum of its proper divisors (38058535583).

123130556065 is a wasteful number, since it uses less digits than its factorization.

123130556065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238737399.

The product of its (nonzero) digits is 81000, while the sum is 37.

Adding to 123130556065 its reverse (560655031321), we get a palindrome (683785587386).

It can be divided in two parts, 123130 and 556065, that added together give a triangular number (679195 = T₁₁₆₅).

The spelling of 123130556065 in words is "one hundred twenty-three billion, one hundred thirty million, five hundred fifty-six thousand, sixty-five".