123315405154573 has 2 divisors, whose sum is σ = 123315405154574. Its totient is φ = 123315405154572.

The previous prime is 123315405154541. The next prime is 123315405154589. The reversal of 123315405154573 is 375451504513321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99352989954409 + 23962415200164 = 9967597^2 + 4895142^2 .

It is a cyclic number.

It is not a de Polignac number, because 123315405154573 - 2⁵ = 123315405154541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123315405154373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61657702577286 + 61657702577287.

It is an arithmetic number, because the mean of its divisors is an integer number (61657702577287).

Almost surely, 2^{123315405154573} is an apocalyptic number.

It is an amenable number.

123315405154573 is a deficient number, since it is larger than the sum of its proper divisors (1).

123315405154573 is an equidigital number, since it uses as much as digits as its factorization.

123315405154573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780000, while the sum is 49.

Adding to 123315405154573 its reverse (375451504513321), we get a palindrome (498766909667894).

The spelling of 123315405154573 in words is "one hundred twenty-three trillion, three hundred fifteen billion, four hundred five million, one hundred fifty-four thousand, five hundred seventy-three".