123453134320 has 40 divisors (see below), whose sum is σ = 287092316880. Its totient is φ = 49370280960.

The previous prime is 123453134303. The next prime is 123453134327. The reversal of 123453134320 is 23431354321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123453134327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195711 + ... + 534049.

It is an arithmetic number, because the mean of its divisors is an integer number (7177307922).

Almost surely, 2^123453134320 is an apocalyptic number.

123453134320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123453134320 is an abundant number, since it is smaller than the sum of its proper divisors (163639182560).

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

123453134320 is a wasteful number, since it uses less digits than its factorization.

123453134320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342913 (or 342907 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 123453134320 its reverse (23431354321), we get a palindrome (146884488641).

The spelling of 123453134320 in words is "one hundred twenty-three billion, four hundred fifty-three million, one hundred thirty-four thousand, three hundred twenty".