8781798828100 has 81 divisors (see below), whose sum is σ = 19349548793757. Its totient is φ = 3459508541280.

The previous prime is 8781798828043. The next prime is 8781798828199. The reversal of 8781798828100 is 18288971878.

The square root of 8781798828100 is 2963410.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3161447578116 + 5620351249984 = 1778046^2 + 2370728^2 .

It is a super-2 number, since 2×8781798828100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1985482489 + ... + 1985486911.

Almost surely, 2^{8781798828100} is an apocalyptic number.

8781798828100 is the 2963410-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8781798828100

8781798828100 is an abundant number, since it is smaller than the sum of its proper divisors (10567749965657).

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

8781798828100 is an frugal number, since it uses more digits than its factorization.

8781798828100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8994 (or 4497 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 67.

The spelling of 8781798828100 in words is "eight trillion, seven hundred eighty-one billion, seven hundred ninety-eight million, eight hundred twenty-eight thousand, one hundred".