123265206320 has 20 divisors (see below), whose sum is σ = 286591604880. Its totient is φ = 49306082496.

The previous prime is 123265206269. The next prime is 123265206343. The reversal of 123265206320 is 23602562321.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×123265206320² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770407460 + ... + 770407619.

It is an arithmetic number, because the mean of its divisors is an integer number (14329580244).

Almost surely, 2^123265206320 is an apocalyptic number.

123265206320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123265206320 is an abundant number, since it is smaller than the sum of its proper divisors (163326398560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123265206320 is a wasteful number, since it uses less digits than its factorization.

123265206320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540815092 (or 1540815086 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 123265206320 its reverse (23602562321), we get a palindrome (146867768641).

The spelling of 123265206320 in words is "one hundred twenty-three billion, two hundred sixty-five million, two hundred six thousand, three hundred twenty".