123645243450452 has 6 divisors (see below), whose sum is σ = 216379176038298. Its totient is φ = 61822621725224.

The previous prime is 123645243450439. The next prime is 123645243450473. The reversal of 123645243450452 is 254054342546321.

It can be written as a sum of positive squares in only one way, i.e., 81466401463876 + 42178841986576 = 9025874^2 + 6494524^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123645243450452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15455655431303 + ... + 15455655431310.

It is an arithmetic number, because the mean of its divisors is an integer number (36063196006383).

Almost surely, 2^{123645243450452} is an apocalyptic number.

It is an amenable number.

123645243450452 is a deficient number, since it is larger than the sum of its proper divisors (92733932587846).

123645243450452 is a wasteful number, since it uses less digits than its factorization.

123645243450452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30911310862617 (or 30911310862615 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 50.

Adding to 123645243450452 its reverse (254054342546321), we get a palindrome (377699585996773).

The spelling of 123645243450452 in words is "one hundred twenty-three trillion, six hundred forty-five billion, two hundred forty-three million, four hundred fifty thousand, four hundred fifty-two".