8469778377 has 4 divisors (see below), whose sum is σ = 11293037840. Its totient is φ = 5646518916.

The previous prime is 8469778277. The next prime is 8469778379. The reversal of 8469778377 is 7738779648.

8469778377 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 8469778377 - 2¹⁰ = 8469777353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8469778379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411629727 + ... + 1411629732.

It is an arithmetic number, because the mean of its divisors is an integer number (2823259460).

Almost surely, 2^8469778377 is an apocalyptic number.

It is an amenable number.

8469778377 is a deficient number, since it is larger than the sum of its proper divisors (2823259463).

8469778377 is a wasteful number, since it uses less digits than its factorization.

8469778377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823259462.

The product of its digits is 99574272, while the sum is 66.

The square root of 8469778377 is about 92031.3988647353. The cubic root of 8469778377 is about 2038.4059680981.

The spelling of 8469778377 in words is "eight billion, four hundred sixty-nine million, seven hundred seventy-eight thousand, three hundred seventy-seven".