77198395349 has 4 divisors (see below), whose sum is σ = 77202600480. Its totient is φ = 77194190220.

The previous prime is 77198395291. The next prime is 77198395363. The reversal of 77198395349 is 94359389177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94359389177 = 409 ⋅230707553.

It is a cyclic number.

It is not a de Polignac number, because 77198395349 - 2²⁸ = 76929959893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77198395849) 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 3 ways as a sum of consecutive naturals, for example, 2074907 + ... + 2111784.

It is an arithmetic number, because the mean of its divisors is an integer number (19300650120).

Almost surely, 2^77198395349 is an apocalyptic number.

It is an amenable number.

77198395349 is a deficient number, since it is larger than the sum of its proper divisors (4205131).

77198395349 is a wasteful number, since it uses less digits than its factorization.

77198395349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205130.

The product of its digits is 51438240, while the sum is 65.

The spelling of 77198395349 in words is "seventy-seven billion, one hundred ninety-eight million, three hundred ninety-five thousand, three hundred forty-nine".