40044355123 has 4 divisors (see below), whose sum is σ = 40044964680. Its totient is φ = 40043745568.

The previous prime is 40044355081. The next prime is 40044355129. The reversal of 40044355123 is 32155344004.

40044355123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40044355123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40044355129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192433 + ... + 342226.

It is an arithmetic number, because the mean of its divisors is an integer number (10011241170).

Almost surely, 2^40044355123 is an apocalyptic number.

40044355123 is a deficient number, since it is larger than the sum of its proper divisors (609557).

40044355123 is an equidigital number, since it uses as much as digits as its factorization.

40044355123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609556.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 40044355123 its reverse (32155344004), we get a palindrome (72199699127).

The spelling of 40044355123 in words is "forty billion, forty-four million, three hundred fifty-five thousand, one hundred twenty-three".