40040200405 has 4 divisors (see below), whose sum is σ = 48048240492. Its totient is φ = 32032160320.

The previous prime is 40040200391. The next prime is 40040200451. The reversal of 40040200405 is 50400204004.

40040200405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 21304613521 + 18735586884 = 145961^2 + 136878^2 .

It is not a de Polignac number, because 40040200405 - 2⁹ = 40040199893 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 4004020036 + ... + 4004020045.

It is an arithmetic number, because the mean of its divisors is an integer number (12012060123).

Almost surely, 2^40040200405 is an apocalyptic number.

It is an amenable number.

40040200405 is a deficient number, since it is larger than the sum of its proper divisors (8008040087).

40040200405 is an equidigital number, since it uses as much as digits as its factorization.

40040200405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8008040086.

The product of its (nonzero) digits is 640, while the sum is 19.

Adding to 40040200405 its reverse (50400204004), we get a palindrome (90440404409).

The spelling of 40040200405 in words is "forty billion, forty million, two hundred thousand, four hundred five".