8469779648 has 56 divisors (see below), whose sum is σ = 18355299840. Its totient is φ = 3845669120.

The previous prime is 8469779629. The next prime is 8469779657.

8469779648 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685913 + ... + 698151.

Almost surely, 2^8469779648 is an apocalyptic number.

8469779648 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8469779648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9177649920).

8469779648 is an abundant number, since it is smaller than the sum of its proper divisors (9885520192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8469779648 is a wasteful number, since it uses less digits than its factorization.

8469779648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245 (or 13235 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 68.

The square root of 8469779648 is about 92031.4057699870. The cubic root of 8469779648 is about 2038.4060700612.

The spelling of 8469779648 in words is "eight billion, four hundred sixty-nine million, seven hundred seventy-nine thousand, six hundred forty-eight".