40140342423 has 10 divisors (see below), whose sum is σ = 59962733864. Its totient is φ = 26760228228.

The previous prime is 40140342413. The next prime is 40140342443. The reversal of 40140342423 is 32424304104.

It is a happy number.

It is not a de Polignac number, because 40140342423 - 2⁵ = 40140342391 is a prime.

It is a super-2 number, since 2×40140342423² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140342413) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 247779811 + ... + 247779972.

Almost surely, 2^40140342423 is an apocalyptic number.

40140342423 is a deficient number, since it is larger than the sum of its proper divisors (19822391441).

40140342423 is an equidigital number, since it uses as much as digits as its factorization.

40140342423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495559795 (or 495559786 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 40140342423 its reverse (32424304104), we get a palindrome (72564646527).

The spelling of 40140342423 in words is "forty billion, one hundred forty million, three hundred forty-two thousand, four hundred twenty-three".