78786876100 has 27 divisors (see below), whose sum is σ = 170973612327. Its totient is φ = 31513627680.

The previous prime is 78786876089. The next prime is 78786876101. The reversal of 78786876100 is 167868787.

The square root of 78786876100 is 280690.

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

It can be written as a sum of positive squares in 4 ways, for example, as 22393925316 + 56392950784 = 149646^2 + 237472^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78786876101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2792866 + ... + 2820934.

Almost surely, 2^78786876100 is an apocalyptic number.

78786876100 is the 280690-th square number.

It is an amenable number.

78786876100 is an abundant number, since it is smaller than the sum of its proper divisors (92186736227).

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

78786876100 is an frugal number, since it uses more digits than its factorization.

78786876100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56152 (or 28076 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 58.

The spelling of 78786876100 in words is "seventy-eight billion, seven hundred eighty-six million, eight hundred seventy-six thousand, one hundred".