77130718243 has 2 divisors, whose sum is σ = 77130718244. Its totient is φ = 77130718242.

The previous prime is 77130718229. The next prime is 77130718261. The reversal of 77130718243 is 34281703177.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77130718243 - 2²¹ = 77128621091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77130718243.

It is not a weakly prime, because it can be changed into another prime (77130718043) 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, 38565359121 + 38565359122.

It is an arithmetic number, because the mean of its divisors is an integer number (38565359122).

Almost surely, 2^77130718243 is an apocalyptic number.

77130718243 is a deficient number, since it is larger than the sum of its proper divisors (1).

77130718243 is an equidigital number, since it uses as much as digits as its factorization.

77130718243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 77130718243 in words is "seventy-seven billion, one hundred thirty million, seven hundred eighteen thousand, two hundred forty-three".