40804281697 has 2 divisors, whose sum is σ = 40804281698. Its totient is φ = 40804281696.

The previous prime is 40804281677. The next prime is 40804281719. The reversal of 40804281697 is 79618240804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521317841 + 5282963856 = 188471^2 + 72684^2 .

It is a cyclic number.

It is not a de Polignac number, because 40804281697 - 2²⁷ = 40670063969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40804281697.

It is not a weakly prime, because it can be changed into another prime (40804281607) 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, 20402140848 + 20402140849.

It is an arithmetic number, because the mean of its divisors is an integer number (20402140849).

Almost surely, 2^40804281697 is an apocalyptic number.

It is an amenable number.

40804281697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40804281697 is an equidigital number, since it uses as much as digits as its factorization.

40804281697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 40804281697 in words is "forty billion, eight hundred four million, two hundred eighty-one thousand, six hundred ninety-seven".