123535531144 has 16 divisors (see below), whose sum is σ = 231639656220. Its totient is φ = 61764956160.

The previous prime is 123535531139. The next prime is 123535531243. The reversal of 123535531144 is 441135535321.

It can be written as a sum of positive squares in 2 ways, for example, as 114015626244 + 9519904900 = 337662^2 + 97570^2 .

It is a super-2 number, since 2×123535531144² (a number of 23 digits) contains 22 as substring.

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, 158049 + ... + 521584.

Almost surely, 2^123535531144 is an apocalyptic number.

It is an amenable number.

123535531144 is a deficient number, since it is larger than the sum of its proper divisors (108104125076).

123535531144 is a wasteful number, since it uses less digits than its factorization.

123535531144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702360 (or 702356 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The spelling of 123535531144 in words is "one hundred twenty-three billion, five hundred thirty-five million, five hundred thirty-one thousand, one hundred forty-four".