40512635813 has 8 divisors (see below), whose sum is σ = 44015091288. Its totient is φ = 37065337344.

The previous prime is 40512635719. The next prime is 40512635819. The reversal of 40512635813 is 31853621504.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1876015969 + 38636619844 = 43313^2 + 196562^2 .

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 40512635813 - 2¹⁸ = 40512373669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512635819) 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, 13787720 + ... + 13790657.

It is an arithmetic number, because the mean of its divisors is an integer number (5501886411).

Almost surely, 2^40512635813 is an apocalyptic number.

It is an amenable number.

40512635813 is a deficient number, since it is larger than the sum of its proper divisors (3502455475).

40512635813 is a wasteful number, since it uses less digits than its factorization.

40512635813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27578503.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 40512635813 in words is "forty billion, five hundred twelve million, six hundred thirty-five thousand, eight hundred thirteen".