77127821443 has 8 divisors (see below), whose sum is σ = 80720029728. Its totient is φ = 73555515264.

The previous prime is 77127821417. The next prime is 77127821521. The reversal of 77127821443 is 34412872177.

It is a happy number.

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 77127821443 - 2⁵ = 77127821411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77127821393 and 77127821402.

It is not an unprimeable number, because it can be changed into a prime (77127825443) 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, 4967596 + ... + 4983097.

It is an arithmetic number, because the mean of its divisors is an integer number (10090003716).

Almost surely, 2^77127821443 is an apocalyptic number.

77127821443 is a deficient number, since it is larger than the sum of its proper divisors (3592208285).

77127821443 is a wasteful number, since it uses less digits than its factorization.

77127821443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9951053.

The product of its digits is 526848, while the sum is 46.

The spelling of 77127821443 in words is "seventy-seven billion, one hundred twenty-seven million, eight hundred twenty-one thousand, four hundred forty-three".