40123443012 has 24 divisors (see below), whose sum is σ = 94548314112. Its totient is φ = 13242060000.

The previous prime is 40123443011. The next prime is 40123443037. The reversal of 40123443012 is 21034432104.

It is not an unprimeable number, because it can be changed into a prime (40123443011) by changing a digit.

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, 16551364 + ... + 16553787.

It is an arithmetic number, because the mean of its divisors is an integer number (3939513088).

Almost surely, 2^40123443012 is an apocalyptic number.

It is an amenable number.

40123443012 is an abundant number, since it is smaller than the sum of its proper divisors (54424871100).

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

40123443012 is a wasteful number, since it uses less digits than its factorization.

40123443012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33105259 (or 33105257 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 40123443012 its reverse (21034432104), we get a palindrome (61157875116).

The spelling of 40123443012 in words is "forty billion, one hundred twenty-three million, four hundred forty-three thousand, twelve".