123533542656 has 108 divisors (see below), whose sum is σ = 363756224832. Its totient is φ = 40301687808.

The previous prime is 123533542651. The next prime is 123533542661. The reversal of 123533542656 is 656245335321.

123533542656 is a `hidden beast` number, since 1 + 2 + 3 + 53 + 3 + 542 + 6 + 56 = 666.

123533542656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (123533542651) and next prime (123533542661).

It is a super-2 number, since 2×123533542656² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123533542651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462106 + ... + 678681.

Almost surely, 2^123533542656 is an apocalyptic number.

123533542656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123533542656 is an abundant number, since it is smaller than the sum of its proper divisors (240222682176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123533542656 is a wasteful number, since it uses less digits than its factorization.

123533542656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140856 (or 1140839 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 45.

Adding to 123533542656 its reverse (656245335321), we get a palindrome (779778877977).

The spelling of 123533542656 in words is "one hundred twenty-three billion, five hundred thirty-three million, five hundred forty-two thousand, six hundred fifty-six".