40392692281 has 2 divisors, whose sum is σ = 40392692282. Its totient is φ = 40392692280.

The previous prime is 40392692267. The next prime is 40392692317. The reversal of 40392692281 is 18229629304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26680282281 + 13712410000 = 163341^2 + 117100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40392692281 is a prime.

It is a super-2 number, since 2×40392692281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40392692251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20196346140 + 20196346141.

It is an arithmetic number, because the mean of its divisors is an integer number (20196346141).

Almost surely, 2^40392692281 is an apocalyptic number.

It is an amenable number.

40392692281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40392692281 is an equidigital number, since it uses as much as digits as its factorization.

40392692281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 40392692281 in words is "forty billion, three hundred ninety-two million, six hundred ninety-two thousand, two hundred eighty-one".