133123023440 has 40 divisors (see below), whose sum is σ = 337648398048. Its totient is φ = 48408371840.

The previous prime is 133123023419. The next prime is 133123023463. The reversal of 133123023440 is 44320321331.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75637202 + ... + 75638961.

Almost surely, 2^133123023440 is an apocalyptic number.

133123023440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133123023440 is an abundant number, since it is smaller than the sum of its proper divisors (204525374608).

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

133123023440 is a wasteful number, since it uses less digits than its factorization.

133123023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151276187 (or 151276181 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 133123023440 its reverse (44320321331), we get a palindrome (177443344771).

The spelling of 133123023440 in words is "one hundred thirty-three billion, one hundred twenty-three million, twenty-three thousand, four hundred forty".