77818884068441 has 4 divisors (see below), whose sum is σ = 77822125600512. Its totient is φ = 77815642536372.

The previous prime is 77818884068389. The next prime is 77818884068459. The reversal of 77818884068441 is 14486048881877.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77818884068441 - 2¹⁴ = 77818884052057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77818884068491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620730025 + ... + 1620778038.

It is an arithmetic number, because the mean of its divisors is an integer number (19455531400128).

Almost surely, 2^{77818884068441} is an apocalyptic number.

It is an amenable number.

77818884068441 is a deficient number, since it is larger than the sum of its proper divisors (3241532071).

77818884068441 is a wasteful number, since it uses less digits than its factorization.

77818884068441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241532070.

The product of its (nonzero) digits is 616562688, while the sum is 74.

The spelling of 77818884068441 in words is "seventy-seven trillion, eight hundred eighteen billion, eight hundred eighty-four million, sixty-eight thousand, four hundred forty-one".