40344323123 has 4 divisors (see below), whose sum is σ = 43447732608. Its totient is φ = 37240913640.

The previous prime is 40344323119. The next prime is 40344323137. The reversal of 40344323123 is 32132344304.

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

It is a cyclic number.

It is not a de Polignac number, because 40344323123 - 2² = 40344323119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40344223123) 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, 1551704723 + ... + 1551704748.

It is an arithmetic number, because the mean of its divisors is an integer number (10861933152).

Almost surely, 2^40344323123 is an apocalyptic number.

40344323123 is a deficient number, since it is larger than the sum of its proper divisors (3103409485).

40344323123 is a wasteful number, since it uses less digits than its factorization.

40344323123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103409484.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 40344323123 its reverse (32132344304), we get a palindrome (72476667427).

The spelling of 40344323123 in words is "forty billion, three hundred forty-four million, three hundred twenty-three thousand, one hundred twenty-three".