77116720547 has 2 divisors, whose sum is σ = 77116720548. Its totient is φ = 77116720546.

The previous prime is 77116720537. The next prime is 77116720559. The reversal of 77116720547 is 74502761177.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77116720547 - 2⁴ = 77116720531 is a prime.

It is not a weakly prime, because it can be changed into another prime (77116720537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38558360273 + 38558360274.

It is an arithmetic number, because the mean of its divisors is an integer number (38558360274).

Almost surely, 2^77116720547 is an apocalyptic number.

77116720547 is a deficient number, since it is larger than the sum of its proper divisors (1).

77116720547 is an equidigital number, since it uses as much as digits as its factorization.

77116720547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576240, while the sum is 47.

The spelling of 77116720547 in words is "seventy-seven billion, one hundred sixteen million, seven hundred twenty thousand, five hundred forty-seven".