78821802884 has 48 divisors (see below), whose sum is σ = 159983268480. Its totient is φ = 33623715840.

The previous prime is 78821802881. The next prime is 78821802919. The reversal of 78821802884 is 48820812887.

It is not an unprimeable number, because it can be changed into a prime (78821802881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681149 + ... + 788420.

It is an arithmetic number, because the mean of its divisors is an integer number (3332984760).

Almost surely, 2^78821802884 is an apocalyptic number.

It is an amenable number.

78821802884 is an abundant number, since it is smaller than the sum of its proper divisors (81161465596).

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

78821802884 is a wasteful number, since it uses less digits than its factorization.

78821802884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469660 (or 1469658 counting only the distinct ones).

The product of its (nonzero) digits is 3670016, while the sum is 56.

The spelling of 78821802884 in words is "seventy-eight billion, eight hundred twenty-one million, eight hundred two thousand, eight hundred eighty-four".