77849055698 has 6 divisors (see below), whose sum is σ = 116774175429. Its totient is φ = 38924330556.

The previous prime is 77849055679. The next prime is 77849055701. The reversal of 77849055698 is 89655094877.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73428534529 + 4420521169 = 270977^2 + 66487^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=197293.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 295940 + ... + 493232.

Almost surely, 2^77849055698 is an apocalyptic number.

77849055698 is a deficient number, since it is larger than the sum of its proper divisors (38925119731).

77849055698 is an frugal number, since it uses more digits than its factorization.

77849055698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394588 (or 197295 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 68.

The spelling of 77849055698 in words is "seventy-seven billion, eight hundred forty-nine million, fifty-five thousand, six hundred ninety-eight".