40405431503513 has 8 divisors (see below), whose sum is σ = 40458347425800. Its totient is φ = 40352517249408.

The previous prime is 40405431503477. The next prime is 40405431503527. The reversal of 40405431503513 is 31530513450404.

It can be written as a sum of positive squares in 4 ways, for example, as 6351997780489 + 34053433723024 = 2520317^2 + 5835532^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40405431503513 - 2⁸ = 40405431503257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40405431503573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52435823 + ... + 53200811.

It is an arithmetic number, because the mean of its divisors is an integer number (5057293428225).

Almost surely, 2^{40405431503513} is an apocalyptic number.

It is an amenable number.

40405431503513 is a deficient number, since it is larger than the sum of its proper divisors (52915922287).

40405431503513 is an equidigital number, since it uses as much as digits as its factorization.

40405431503513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834091.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 40405431503513 its reverse (31530513450404), we get a palindrome (71935944953917).

The spelling of 40405431503513 in words is "forty trillion, four hundred five billion, four hundred thirty-one million, five hundred three thousand, five hundred thirteen".