77198314077 has 12 divisors (see below), whose sum is σ = 114522424380. Its totient is φ = 50074581888.

The previous prime is 77198314009. The next prime is 77198314121. The reversal of 77198314077 is 77041389177.

It is a happy number.

77198314077 is a `hidden beast` number, since 77 + 198 + 314 + 0 + 77 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 73407941721 + 3790372356 = 270939^2 + 61566^2 .

It is not a de Polignac number, because 77198314077 - 2²⁸ = 76929878621 is a prime.

It is a super-2 number, since 2×77198314077² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77198314007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115913052 + ... + 115913717.

It is an arithmetic number, because the mean of its divisors is an integer number (9543535365).

Almost surely, 2^77198314077 is an apocalyptic number.

It is an amenable number.

77198314077 is a deficient number, since it is larger than the sum of its proper divisors (37324110303).

77198314077 is a wasteful number, since it uses less digits than its factorization.

77198314077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231826812 (or 231826809 counting only the distinct ones).

The product of its (nonzero) digits is 2074464, while the sum is 54.

The spelling of 77198314077 in words is "seventy-seven billion, one hundred ninety-eight million, three hundred fourteen thousand, seventy-seven".