40000040077 has 2 divisors, whose sum is σ = 40000040078. Its totient is φ = 40000040076.

The previous prime is 40000040039. The next prime is 40000040089. The reversal of 40000040077 is 77004000004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39949615876 + 50424201 = 199874^2 + 7101^2 .

It is a cyclic number.

It is not a de Polignac number, because 40000040077 - 2²⁷ = 39865822349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40000043077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000020038 + 20000020039.

It is an arithmetic number, because the mean of its divisors is an integer number (20000020039).

Almost surely, 2^40000040077 is an apocalyptic number.

It is an amenable number.

40000040077 is a deficient number, since it is larger than the sum of its proper divisors (1).

40000040077 is an equidigital number, since it uses as much as digits as its factorization.

40000040077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 22.

The spelling of 40000040077 in words is "forty billion, forty thousand, seventy-seven".