77789114649 has 27 divisors (see below), whose sum is σ = 116142285909. Its totient is φ = 50169791160.

The previous prime is 77789114581. The next prime is 77789114659. The reversal of 77789114649 is 94641198777.

The square root of 77789114649 is 278907.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 77789114649 - 2²⁵ = 77755560217 is a prime.

It is a super-2 number, since 2×77789114649² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77789114659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25936852 + ... + 25939850.

Almost surely, 2^77789114649 is an apocalyptic number.

77789114649 is the 278907-th square number.

77789114649 is the 139454-th centered octagonal number.

It is an amenable number.

77789114649 is a deficient number, since it is larger than the sum of its proper divisors (38353171260).

77789114649 is an frugal number, since it uses more digits than its factorization.

77789114649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066 (or 3033 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The spelling of 77789114649 in words is "seventy-seven billion, seven hundred eighty-nine million, one hundred fourteen thousand, six hundred forty-nine".