123661352532 has 12 divisors (see below), whose sum is σ = 288543155936. Its totient is φ = 41220450840.

The previous prime is 123661352513. The next prime is 123661352533. The reversal of 123661352532 is 235253166321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×123661352532² (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 (123661352533) 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, 5152556344 + ... + 5152556367.

Almost surely, 2^123661352532 is an apocalyptic number.

123661352532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123661352532 is an abundant number, since it is smaller than the sum of its proper divisors (164881803404).

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

123661352532 is a wasteful number, since it uses less digits than its factorization.

123661352532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10305112718 (or 10305112716 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The spelling of 123661352532 in words is "one hundred twenty-three billion, six hundred sixty-one million, three hundred fifty-two thousand, five hundred thirty-two".