123531523516 has 12 divisors (see below), whose sum is σ = 216267599632. Its totient is φ = 61740780768.

The previous prime is 123531523483. The next prime is 123531523537. The reversal of 123531523516 is 615325135321.

It is a super-2 number, since 2×123531523516² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 6234120 + ... + 6253903.

Almost surely, 2^123531523516 is an apocalyptic number.

It is an amenable number.

123531523516 is a deficient number, since it is larger than the sum of its proper divisors (92736076116).

123531523516 is a wasteful number, since it uses less digits than its factorization.

123531523516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12490500 (or 12490498 counting only the distinct ones).

The product of its digits is 81000, while the sum is 37.

Adding to 123531523516 its reverse (615325135321), we get a palindrome (738856658837).

The spelling of 123531523516 in words is "one hundred twenty-three billion, five hundred thirty-one million, five hundred twenty-three thousand, five hundred sixteen".