40123142305 has 4 divisors (see below), whose sum is σ = 48147770772. Its totient is φ = 32098513840.

The previous prime is 40123142273. The next prime is 40123142317. The reversal of 40123142305 is 50324132104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23130455569 + 16992686736 = 152087^2 + 130356^2 .

It is not a de Polignac number, because 40123142305 - 2⁵ = 40123142273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40123142305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4012314226 + ... + 4012314235.

It is an arithmetic number, because the mean of its divisors is an integer number (12036942693).

Almost surely, 2^40123142305 is an apocalyptic number.

It is an amenable number.

40123142305 is a deficient number, since it is larger than the sum of its proper divisors (8024628467).

40123142305 is an equidigital number, since it uses as much as digits as its factorization.

40123142305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024628466.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 40123142305 its reverse (50324132104), we get a palindrome (90447274409).

The spelling of 40123142305 in words is "forty billion, one hundred twenty-three million, one hundred forty-two thousand, three hundred five".