77728724144611 has 2 divisors, whose sum is σ = 77728724144612. Its totient is φ = 77728724144610.

The previous prime is 77728724144563. The next prime is 77728724144623. The reversal of 77728724144611 is 11644142782777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77728724144611 - 2⁷ = 77728724144483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77728724144611.

It is not a weakly prime, because it can be changed into another prime (77728724144311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38864362072305 + 38864362072306.

It is an arithmetic number, because the mean of its divisors is an integer number (38864362072306).

Almost surely, 2^{77728724144611} is an apocalyptic number.

77728724144611 is a deficient number, since it is larger than the sum of its proper divisors (1).

77728724144611 is an equidigital number, since it uses as much as digits as its factorization.

77728724144611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29503488, while the sum is 61.

The spelling of 77728724144611 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred twenty-four million, one hundred forty-four thousand, six hundred eleven".