77171210332129 has 2 divisors, whose sum is σ = 77171210332130. Its totient is φ = 77171210332128.

The previous prime is 77171210332109. The next prime is 77171210332261. The reversal of 77171210332129 is 92123301217177.

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., 77117411849104 + 53798483025 = 8781652^2 + 231945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77171210332129 is a prime.

It is not a weakly prime, because it can be changed into another prime (77171210332109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38585605166064 + 38585605166065.

It is an arithmetic number, because the mean of its divisors is an integer number (38585605166065).

Almost surely, 2^{77171210332129} is an apocalyptic number.

It is an amenable number.

77171210332129 is a deficient number, since it is larger than the sum of its proper divisors (1).

77171210332129 is an equidigital number, since it uses as much as digits as its factorization.

77171210332129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 46.

The spelling of 77171210332129 in words is "seventy-seven trillion, one hundred seventy-one billion, two hundred ten million, three hundred thirty-two thousand, one hundred twenty-nine".