123640013345 has 8 divisors (see below), whose sum is σ = 150155582976. Its totient is φ = 97720299376.

The previous prime is 123640013339. The next prime is 123640013347. The reversal of 123640013345 is 543310046321.

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 123640013345 - 2⁶ = 123640013281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123640013347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148963457 + ... + 148964286.

It is an arithmetic number, because the mean of its divisors is an integer number (18769447872).

Almost surely, 2^123640013345 is an apocalyptic number.

It is an amenable number.

123640013345 is a deficient number, since it is larger than the sum of its proper divisors (26515569631).

123640013345 is an equidigital number, since it uses as much as digits as its factorization.

123640013345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297927831.

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

Adding to 123640013345 its reverse (543310046321), we get a palindrome (666950059666).

The spelling of 123640013345 in words is "one hundred twenty-three billion, six hundred forty million, thirteen thousand, three hundred forty-five".