40404404477 has 2 divisors, whose sum is σ = 40404404478. Its totient is φ = 40404404476.

The previous prime is 40404404431. The next prime is 40404404503. The reversal of 40404404477 is 77440440404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40196641081 + 207763396 = 200491^2 + 14414^2 .

It is a cyclic number.

It is not a de Polignac number, because 40404404477 - 2²⁶ = 40337295613 is a prime.

It is a super-2 number, since 2×40404404477² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40404404477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40404404177) 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, 20202202238 + 20202202239.

It is an arithmetic number, because the mean of its divisors is an integer number (20202202239).

Almost surely, 2^40404404477 is an apocalyptic number.

It is an amenable number.

40404404477 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404404477 is an equidigital number, since it uses as much as digits as its factorization.

40404404477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200704, while the sum is 38.

The spelling of 40404404477 in words is "forty billion, four hundred four million, four hundred four thousand, four hundred seventy-seven".