40431129601 has 4 divisors (see below), whose sum is σ = 40499310852. Its totient is φ = 40362948352.

The previous prime is 40431129533. The next prime is 40431129671. The reversal of 40431129601 is 10692113404.

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 14484363201 + 25946766400 = 120351^2 + 161080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40431129601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40431129671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34089736 + ... + 34090921.

It is an arithmetic number, because the mean of its divisors is an integer number (10124827713).

Almost surely, 2^40431129601 is an apocalyptic number.

It is an amenable number.

40431129601 is a deficient number, since it is larger than the sum of its proper divisors (68181251).

40431129601 is an equidigital number, since it uses as much as digits as its factorization.

40431129601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68181250.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 40431129601 in words is "forty billion, four hundred thirty-one million, one hundred twenty-nine thousand, six hundred one".