8779816469 has 4 divisors (see below), whose sum is σ = 9017108844. Its totient is φ = 8542524096.

The previous prime is 8779816429. The next prime is 8779816471. The reversal of 8779816469 is 9646189778.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4216813969 + 4563002500 = 64937^2 + 67550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8779816469 is a prime.

It is a super-2 number, since 2×8779816469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8779816429) 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, 118646132 + ... + 118646205.

It is an arithmetic number, because the mean of its divisors is an integer number (2254277211).

Almost surely, 2^8779816469 is an apocalyptic number.

It is an amenable number.

8779816469 is a deficient number, since it is larger than the sum of its proper divisors (237292375).

8779816469 is a wasteful number, since it uses less digits than its factorization.

8779816469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237292374.

The product of its digits is 36578304, while the sum is 65.

The square root of 8779816469 is about 93700.6748588291. The cubic root of 8779816469 is about 2062.9806091690.

The spelling of 8779816469 in words is "eight billion, seven hundred seventy-nine million, eight hundred sixteen thousand, four hundred sixty-nine".