77381685249 has 8 divisors (see below), whose sum is σ = 112555178592. Its totient is φ = 46897991040.

The previous prime is 77381685247. The next prime is 77381685253. The reversal of 77381685249 is 94258618377.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77381685249 - 2¹ = 77381685247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77381685192 and 77381685201.

It is not an unprimeable number, because it can be changed into a prime (77381685247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172449744 + ... + 1172449809.

It is an arithmetic number, because the mean of its divisors is an integer number (14069397324).

Almost surely, 2^77381685249 is an apocalyptic number.

It is an amenable number.

77381685249 is a deficient number, since it is larger than the sum of its proper divisors (35173493343).

77381685249 is a wasteful number, since it uses less digits than its factorization.

77381685249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344899567.

The product of its digits is 20321280, while the sum is 60.

The spelling of 77381685249 in words is "seventy-seven billion, three hundred eighty-one million, six hundred eighty-five thousand, two hundred forty-nine".