123132511523449 has 4 divisors (see below), whose sum is σ = 123139696725364. Its totient is φ = 123125326321536.

The previous prime is 123132511523407. The next prime is 123132511523471. The reversal of 123132511523449 is 944325115231321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1604883585600 + 121527627937849 = 1266840^2 + 11023957^2 .

It is a cyclic number.

It is not a de Polignac number, because 123132511523449 - 2¹⁷ = 123132511392377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123132511523399 and 123132511523408.

It is not an unprimeable number, because it can be changed into a prime (123132511523849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3592575252 + ... + 3592609525.

It is an arithmetic number, because the mean of its divisors is an integer number (30784924181341).

Almost surely, 2^{123132511523449} is an apocalyptic number.

It is an amenable number.

123132511523449 is a deficient number, since it is larger than the sum of its proper divisors (7185201915).

123132511523449 is an equidigital number, since it uses as much as digits as its factorization.

123132511523449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7185201914.

The product of its digits is 777600, while the sum is 46.

The spelling of 123132511523449 in words is "one hundred twenty-three trillion, one hundred thirty-two billion, five hundred eleven million, five hundred twenty-three thousand, four hundred forty-nine".