77498724728869 has 2 divisors, whose sum is σ = 77498724728870. Its totient is φ = 77498724728868.

The previous prime is 77498724728857. The next prime is 77498724728899. The reversal of 77498724728869 is 96882742789477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54911879165025 + 22586845563844 = 7410255^2 + 4752562^2 .

It is a cyclic number.

It is not a de Polignac number, because 77498724728869 - 2⁹ = 77498724728357 is a prime.

It is a super-2 number, since 2×77498724728869² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77498724728869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77498724728849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38749362364434 + 38749362364435.

It is an arithmetic number, because the mean of its divisors is an integer number (38749362364435).

Almost surely, 2^{77498724728869} is an apocalyptic number.

It is an amenable number.

77498724728869 is a deficient number, since it is larger than the sum of its proper divisors (1).

77498724728869 is an equidigital number, since it uses as much as digits as its factorization.

77498724728869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38236520448, while the sum is 88.

The spelling of 77498724728869 in words is "seventy-seven trillion, four hundred ninety-eight billion, seven hundred twenty-four million, seven hundred twenty-eight thousand, eight hundred sixty-nine".