123340510305 has 48 divisors (see below), whose sum is σ = 221298714000. Its totient is φ = 63474098688.

The previous prime is 123340510297. The next prime is 123340510331. The reversal of 123340510305 is 503015043321.

123340510305 is a `hidden beast` number, since 1 + 2 + 3 + 340 + 5 + 10 + 305 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1047622689 + 122292887616 = 32367^2 + 349704^2 .

It is not a de Polignac number, because 123340510305 - 2³ = 123340510297 is a prime.

It is a super-2 number, since 2×123340510305² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2149731 + ... + 2206359.

It is an arithmetic number, because the mean of its divisors is an integer number (4610389875).

Almost surely, 2^123340510305 is an apocalyptic number.

123340510305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123340510305 is a deficient number, since it is larger than the sum of its proper divisors (97958203695).

123340510305 is a wasteful number, since it uses less digits than its factorization.

123340510305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58338 (or 58335 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 123340510305 its reverse (503015043321), we get a palindrome (626355553626).

The spelling of 123340510305 in words is "one hundred twenty-three billion, three hundred forty million, five hundred ten thousand, three hundred five".