77878201313 has 8 divisors (see below), whose sum is σ = 84960200640. Its totient is φ = 70796562480.

The previous prime is 77878201309. The next prime is 77878201327. The reversal of 77878201313 is 31310287877.

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

It is a cyclic number.

It is not a de Polignac number, because 77878201313 - 2² = 77878201309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77878201613) 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 7 ways as a sum of consecutive naturals, for example, 575123 + ... + 697511.

It is an arithmetic number, because the mean of its divisors is an integer number (10620025080).

Almost surely, 2^77878201313 is an apocalyptic number.

It is an amenable number.

77878201313 is a deficient number, since it is larger than the sum of its proper divisors (7081999327).

77878201313 is a wasteful number, since it uses less digits than its factorization.

77878201313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180247.

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 77878201313 in words is "seventy-seven billion, eight hundred seventy-eight million, two hundred one thousand, three hundred thirteen".