123440533000 has 64 divisors (see below), whose sum is σ = 288903391920. Its totient is φ = 49367232000.

The previous prime is 123440532989. The next prime is 123440533003. The reversal of 123440533000 is 335044321.

It can be written as a sum of positive squares in 8 ways, for example, as 31147308196 + 92293224804 = 176486^2 + 303798^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (123440533003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9606580 + ... + 9619420.

Almost surely, 2^123440533000 is an apocalyptic number.

123440533000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123440533000 is an abundant number, since it is smaller than the sum of its proper divisors (165462858920).

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

123440533000 is a wasteful number, since it uses less digits than its factorization.

123440533000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22475 (or 22461 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 123440533000 its reverse (335044321), we get a palindrome (123775577321).

The spelling of 123440533000 in words is "one hundred twenty-three billion, four hundred forty million, five hundred thirty-three thousand".