40635020077 has 2 divisors, whose sum is σ = 40635020078. Its totient is φ = 40635020076.

The previous prime is 40635020053. The next prime is 40635020137. The reversal of 40635020077 is 77002053604.

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., 27112586281 + 13522433796 = 164659^2 + 116286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40635020077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40635020017) 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, 20317510038 + 20317510039.

It is an arithmetic number, because the mean of its divisors is an integer number (20317510039).

Almost surely, 2^40635020077 is an apocalyptic number.

It is an amenable number.

40635020077 is a deficient number, since it is larger than the sum of its proper divisors (1).

40635020077 is an equidigital number, since it uses as much as digits as its factorization.

40635020077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 34.

The spelling of 40635020077 in words is "forty billion, six hundred thirty-five million, twenty thousand, seventy-seven".