40020400305005 has 32 divisors (see below), whose sum is σ = 48348389273184. Its totient is φ = 31801141886976.

The previous prime is 40020400304993. The next prime is 40020400305013. The reversal of 40020400305005 is 50050300402004.

It can be written as a sum of positive squares in 16 ways, for example, as 11043937390564 + 28976462914441 = 3323242^2 + 5382979^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020400305005 - 2²² = 40020396110701 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 31 ways as a sum of consecutive naturals, for example, 1843143029 + ... + 1843164741.

It is an arithmetic number, because the mean of its divisors is an integer number (1510887164787).

Almost surely, 2^{40020400305005} is an apocalyptic number.

It is an amenable number.

40020400305005 is a deficient number, since it is larger than the sum of its proper divisors (8327988968179).

40020400305005 is a wasteful number, since it uses less digits than its factorization.

40020400305005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25985.

The product of its (nonzero) digits is 2400, while the sum is 23.

Adding to 40020400305005 its reverse (50050300402004), we get a palindrome (90070700707009).

The spelling of 40020400305005 in words is "forty trillion, twenty billion, four hundred million, three hundred five thousand, five".