77130376289 has 2 divisors, whose sum is σ = 77130376290. Its totient is φ = 77130376288.

The previous prime is 77130376261. The next prime is 77130376313. The reversal of 77130376289 is 98267303177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47800388689 + 29329987600 = 218633^2 + 171260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77130376289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77130376289.

It is not a weakly prime, because it can be changed into another prime (77130376259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38565188144 + 38565188145.

It is an arithmetic number, because the mean of its divisors is an integer number (38565188145).

Almost surely, 2^77130376289 is an apocalyptic number.

It is an amenable number.

77130376289 is a deficient number, since it is larger than the sum of its proper divisors (1).

77130376289 is an equidigital number, since it uses as much as digits as its factorization.

77130376289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 77130376289 in words is "seventy-seven billion, one hundred thirty million, three hundred seventy-six thousand, two hundred eighty-nine".