40121431405 has 16 divisors (see below), whose sum is σ = 52526491200. Its totient is φ = 29177061760.

The previous prime is 40121431397. The next prime is 40121431421. The reversal of 40121431405 is 50413412104.

It is not a de Polignac number, because 40121431405 - 2³ = 40121431397 is a prime.

It is a super-2 number, since 2×40121431405² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40121431405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1443126 + ... + 1470664.

It is an arithmetic number, because the mean of its divisors is an integer number (3282905700).

Almost surely, 2^40121431405 is an apocalyptic number.

It is an amenable number.

40121431405 is a deficient number, since it is larger than the sum of its proper divisors (12405059795).

40121431405 is a wasteful number, since it uses less digits than its factorization.

40121431405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54044.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 40121431405 its reverse (50413412104), we get a palindrome (90534843509).

The spelling of 40121431405 in words is "forty billion, one hundred twenty-one million, four hundred thirty-one thousand, four hundred five".