77284730869 has 2 divisors, whose sum is σ = 77284730870. Its totient is φ = 77284730868.

The previous prime is 77284730837. The next prime is 77284730933. The reversal of 77284730869 is 96803748277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64325640625 + 12959090244 = 253625^2 + 113838^2 .

It is a cyclic number.

It is not a de Polignac number, because 77284730869 - 2⁵ = 77284730837 is a prime.

It is a super-2 number, since 2×77284730869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77284730819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38642365434 + 38642365435.

It is an arithmetic number, because the mean of its divisors is an integer number (38642365435).

Almost surely, 2^77284730869 is an apocalyptic number.

It is an amenable number.

77284730869 is a deficient number, since it is larger than the sum of its proper divisors (1).

77284730869 is an equidigital number, since it uses as much as digits as its factorization.

77284730869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 77284730869 in words is "seventy-seven billion, two hundred eighty-four million, seven hundred thirty thousand, eight hundred sixty-nine".