40816708381 has 2 divisors, whose sum is σ = 40816708382. Its totient is φ = 40816708380.

The previous prime is 40816708307. The next prime is 40816708421. The reversal of 40816708381 is 18380761804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32773309156 + 8043399225 = 181034^2 + 89685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40816708381 is a prime.

It is a super-2 number, since 2×40816708381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40816708301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20408354190 + 20408354191.

It is an arithmetic number, because the mean of its divisors is an integer number (20408354191).

Almost surely, 2^40816708381 is an apocalyptic number.

It is an amenable number.

40816708381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40816708381 is an equidigital number, since it uses as much as digits as its factorization.

40816708381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 40816708381 in words is "forty billion, eight hundred sixteen million, seven hundred eight thousand, three hundred eighty-one".