40042533161 has 2 divisors, whose sum is σ = 40042533162. Its totient is φ = 40042533160.

The previous prime is 40042533137. The next prime is 40042533187. The reversal of 40042533161 is 16133524004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37420581136 + 2621952025 = 193444^2 + 51205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40042533161 is a prime.

It is not a weakly prime, because it can be changed into another prime (40042533121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021266580 + 20021266581.

It is an arithmetic number, because the mean of its divisors is an integer number (20021266581).

Almost surely, 2^40042533161 is an apocalyptic number.

It is an amenable number.

40042533161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042533161 is an equidigital number, since it uses as much as digits as its factorization.

40042533161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 40042533161 in words is "forty billion, forty-two million, five hundred thirty-three thousand, one hundred sixty-one".