123444312502345 has 4 divisors (see below), whose sum is σ = 148133175002820. Its totient is φ = 98755450001872.

The previous prime is 123444312502339. The next prime is 123444312502351. The reversal of 123444312502345 is 543205213444321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123444312502339) and next prime (123444312502351).

It can be written as a sum of positive squares in 2 ways, for example, as 44937287646784 + 78507024855561 = 6703528^2 + 8860419^2 .

It is a cyclic number.

It is not a de Polignac number, because 123444312502345 - 2³³ = 123435722567753 is a prime.

It is a super-2 number, since 2×123444312502345² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12344431250230 + ... + 12344431250239.

It is an arithmetic number, because the mean of its divisors is an integer number (37033293750705).

Almost surely, 2^{123444312502345} is an apocalyptic number.

It is an amenable number.

123444312502345 is a deficient number, since it is larger than the sum of its proper divisors (24688862500475).

123444312502345 is an equidigital number, since it uses as much as digits as its factorization.

123444312502345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24688862500474.

The product of its (nonzero) digits is 1382400, while the sum is 43.

Adding to 123444312502345 its reverse (543205213444321), we get a palindrome (666649525946666).

The spelling of 123444312502345 in words is "one hundred twenty-three trillion, four hundred forty-four billion, three hundred twelve million, five hundred two thousand, three hundred forty-five".