8275649778 has 24 divisors (see below), whose sum is σ = 19560627216. Its totient is φ = 2507772600.

The previous prime is 8275649773. The next prime is 8275649783. The reversal of 8275649778 is 8779465728.

8275649778 is a `hidden beast` number, since 8 + 2 + 75 + 6 + 497 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (8275649773) and next prime (8275649783).

It is a super-2 number, since 2×8275649778² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8275649771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20897908 + ... + 20898303.

It is an arithmetic number, because the mean of its divisors is an integer number (815026134).

Almost surely, 2^8275649778 is an apocalyptic number.

8275649778 is an abundant number, since it is smaller than the sum of its proper divisors (11284977438).

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

8275649778 is a wasteful number, since it uses less digits than its factorization.

8275649778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41796230 (or 41796227 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The square root of 8275649778 is about 90970.5984260849. The cubic root of 8275649778 is about 2022.7119228206.

The spelling of 8275649778 in words is "eight billion, two hundred seventy-five million, six hundred forty-nine thousand, seven hundred seventy-eight".