77403668141 has 2 divisors, whose sum is σ = 77403668142. Its totient is φ = 77403668140.

The previous prime is 77403668129. The next prime is 77403668159. The reversal of 77403668141 is 14186630477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42417462025 + 34986206116 = 205955^2 + 187046^2 .

It is a cyclic number.

It is not a de Polignac number, because 77403668141 - 2⁶ = 77403668077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77403668101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38701834070 + 38701834071.

It is an arithmetic number, because the mean of its divisors is an integer number (38701834071).

Almost surely, 2^77403668141 is an apocalyptic number.

It is an amenable number.

77403668141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77403668141 is an equidigital number, since it uses as much as digits as its factorization.

77403668141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 77403668141 in words is "seventy-seven billion, four hundred three million, six hundred sixty-eight thousand, one hundred forty-one".