8778217798 has 24 divisors (see below), whose sum is σ = 15323601384. Its totient is φ = 3760495200.

The previous prime is 8778217787. The next prime is 8778217813. The reversal of 8778217798 is 8977128778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229293 + ... + 264823.

It is an arithmetic number, because the mean of its divisors is an integer number (638483391).

Almost surely, 2^8778217798 is an apocalyptic number.

8778217798 is a deficient number, since it is larger than the sum of its proper divisors (6545383586).

8778217798 is a wasteful number, since it uses less digits than its factorization.

8778217798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38068 (or 38061 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 64.

The square root of 8778217798 is about 93692.1437368150. The cubic root of 8778217798 is about 2062.8553891078.

It can be divided in two parts, 8778 and 217798, that added together give a square (226576 = 476²).

The spelling of 8778217798 in words is "eight billion, seven hundred seventy-eight million, two hundred seventeen thousand, seven hundred ninety-eight".