40505401423 has 4 divisors (see below), whose sum is σ = 41600142040. Its totient is φ = 39410660808.

The previous prime is 40505401357. The next prime is 40505401429. The reversal of 40505401423 is 32410450504.

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 40505401423 - 2²¹ = 40503304271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40505401391 and 40505401400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505401429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547370253 + ... + 547370326.

It is an arithmetic number, because the mean of its divisors is an integer number (10400035510).

Almost surely, 2^40505401423 is an apocalyptic number.

40505401423 is a deficient number, since it is larger than the sum of its proper divisors (1094740617).

40505401423 is a wasteful number, since it uses less digits than its factorization.

40505401423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094740616.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 40505401423 its reverse (32410450504), we get a palindrome (72915851927).

The spelling of 40505401423 in words is "forty billion, five hundred five million, four hundred one thousand, four hundred twenty-three".