40404037313 has 2 divisors, whose sum is σ = 40404037314.
Its totient is φ = 40404037312.
The previous prime is 40404037307. The next prime is 40404037337. The reversal of 40404037313 is 31373040404.
Adding to 40404037313 its reverse (31373040404), we get a palindrome (71777077717).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 29826326209 + 10577711104 = 172703^2 + 102848^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-40404037313 is a prime.
It is not a weakly prime, because it can be changed into another prime (40404037213) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202018656 + 20202018657.
It is an arithmetic number, because the mean of its divisors is an integer number (20202018657).
Almost surely, 240404037313 is an apocalyptic number.
It is an amenable number.
40404037313 is a deficient number, since it is larger than the sum of its proper divisors (1).
40404037313 is an equidigital number, since it uses as much as digits as its factorization.
40404037313 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 12096, while the sum is 29.
The spelling of 40404037313 in words is "forty billion, four hundred four million, thirty-seven thousand, three hundred thirteen".