40178903077 has 2 divisors, whose sum is σ = 40178903078. Its totient is φ = 40178903076.

The previous prime is 40178903003. The next prime is 40178903087. The reversal of 40178903077 is 77030987104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39597418081 + 581484996 = 198991^2 + 24114^2 .

It is a cyclic number.

It is not a de Polignac number, because 40178903077 - 2⁷ = 40178902949 is a prime.

It is a super-2 number, since 2×40178903077² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40178903087) 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, 20089451538 + 20089451539.

It is an arithmetic number, because the mean of its divisors is an integer number (20089451539).

Almost surely, 2^40178903077 is an apocalyptic number.

It is an amenable number.

40178903077 is a deficient number, since it is larger than the sum of its proper divisors (1).

40178903077 is an equidigital number, since it uses as much as digits as its factorization.

40178903077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 40178903077 in words is "forty billion, one hundred seventy-eight million, nine hundred three thousand, seventy-seven".