77995861841 has 16 divisors (see below), whose sum is σ = 83009070144. Its totient is φ = 73030823424.

The previous prime is 77995861829. The next prime is 77995861843. The reversal of 77995861841 is 14816859977.

It is a cyclic number.

It is not a de Polignac number, because 77995861841 - 2⁶ = 77995861777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77995861843) 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 15 ways as a sum of consecutive naturals, for example, 2768870 + ... + 2796896.

It is an arithmetic number, because the mean of its divisors is an integer number (5188066884).

Almost surely, 2^77995861841 is an apocalyptic number.

It is an amenable number.

77995861841 is a deficient number, since it is larger than the sum of its proper divisors (5013208303).

77995861841 is a wasteful number, since it uses less digits than its factorization.

77995861841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28880.

The product of its digits is 30481920, while the sum is 65.

The spelling of 77995861841 in words is "seventy-seven billion, nine hundred ninety-five million, eight hundred sixty-one thousand, eight hundred forty-one".