40531036109 has 2 divisors, whose sum is σ = 40531036110. Its totient is φ = 40531036108.

The previous prime is 40531036027. The next prime is 40531036127. The reversal of 40531036109 is 90163013504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33545754025 + 6985282084 = 183155^2 + 83578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40531036109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40531036709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265518054 + 20265518055.

It is an arithmetic number, because the mean of its divisors is an integer number (20265518055).

Almost surely, 2^40531036109 is an apocalyptic number.

It is an amenable number.

40531036109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531036109 is an equidigital number, since it uses as much as digits as its factorization.

40531036109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The spelling of 40531036109 in words is "forty billion, five hundred thirty-one million, thirty-six thousand, one hundred nine".