8777842487778 has 96 divisors (see below), whose sum is σ = 21818824626816. Its totient is φ = 2292557796864.

The previous prime is 8777842487759. The next prime is 8777842487833.

8777842487778 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 8777842487778.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5034826 + ... + 6550202.

It is an arithmetic number, because the mean of its divisors is an integer number (227279423196).

Almost surely, 2^{8777842487778} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8777842487778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10909412313408).

8777842487778 is an abundant number, since it is smaller than the sum of its proper divisors (13040982139038).

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

8777842487778 is a wasteful number, since it uses less digits than its factorization.

8777842487778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515608 (or 1515505 counting only the distinct ones).

The product of its digits is 15420489728, while the sum is 84.

The spelling of 8777842487778 in words is "eight trillion, seven hundred seventy-seven billion, eight hundred forty-two million, four hundred eighty-seven thousand, seven hundred seventy-eight".