123433545520 has 40 divisors (see below), whose sum is σ = 288586283760. Its totient is φ = 49097583360.

The previous prime is 123433545449. The next prime is 123433545559. The reversal of 123433545520 is 25545334321.

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

It is a self number, because there is not a number n which added to its sum of digits gives 123433545520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295511 + ... + 4324150.

It is an arithmetic number, because the mean of its divisors is an integer number (7214657094).

Almost surely, 2^123433545520 is an apocalyptic number.

123433545520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123433545520 is an abundant number, since it is smaller than the sum of its proper divisors (165152738240).

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

123433545520 is a wasteful number, since it uses less digits than its factorization.

123433545520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8619853 (or 8619847 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 123433545520 its reverse (25545334321), we get a palindrome (148978879841).

The spelling of 123433545520 in words is "one hundred twenty-three billion, four hundred thirty-three million, five hundred forty-five thousand, five hundred twenty".