40123209042 has 48 divisors (see below), whose sum is σ = 99483501312. Its totient is φ = 11448682560.

The previous prime is 40123209041. The next prime is 40123209047. The reversal of 40123209042 is 24090232104.

40123209042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40123208997 and 40123209015.

It is not an unprimeable number, because it can be changed into a prime (40123209041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113338 + ... + 305109.

It is an arithmetic number, because the mean of its divisors is an integer number (2072572944).

Almost surely, 2^40123209042 is an apocalyptic number.

40123209042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

40123209042 is an abundant number, since it is smaller than the sum of its proper divisors (59360292270).

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

40123209042 is a wasteful number, since it uses less digits than its factorization.

40123209042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419223 (or 419220 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 40123209042 in words is "forty billion, one hundred twenty-three million, two hundred nine thousand, forty-two".