77891057027 has 8 divisors (see below), whose sum is σ = 89023159392. Its totient is φ = 66760156800.

The previous prime is 77891057003. The next prime is 77891057047. The reversal of 77891057027 is 72075019877.

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 77891057027 - 2¹⁶ = 77890991491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77891057027.

It is not an unprimeable number, because it can be changed into a prime (77891057047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157124 + ... + 424817.

It is an arithmetic number, because the mean of its divisors is an integer number (11127894924).

Almost surely, 2^77891057027 is an apocalyptic number.

77891057027 is a deficient number, since it is larger than the sum of its proper divisors (11132102365).

77891057027 is a wasteful number, since it uses less digits than its factorization.

77891057027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601069.

The product of its (nonzero) digits is 1728720, while the sum is 53.

The spelling of 77891057027 in words is "seventy-seven billion, eight hundred ninety-one million, fifty-seven thousand, twenty-seven".