123531311064148 has 48 divisors (see below), whose sum is σ = 236628191996560. Its totient is φ = 56079162086400.

The previous prime is 123531311064097. The next prime is 123531311064149. The reversal of 123531311064148 is 841460113135321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 82844620017604 + 40686691046544 = 9101902^2 + 6378612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123531311064149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400244128 + ... + 400552648.

Almost surely, 2^{123531311064148} is an apocalyptic number.

It is an amenable number.

123531311064148 is a deficient number, since it is larger than the sum of its proper divisors (113096880932412).

123531311064148 is a wasteful number, since it uses less digits than its factorization.

123531311064148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434828 (or 434826 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

Adding to 123531311064148 its reverse (841460113135321), we get a palindrome (964991424199469).

The spelling of 123531311064148 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, three hundred eleven million, sixty-four thousand, one hundred forty-eight".