6782878524816 has 45 divisors (see below), whose sum is σ = 18982726669569. Its totient is φ = 2260949090688.

The previous prime is 6782878524809. The next prime is 6782878524839. The reversal of 6782878524816 is 6184258782876.

The square root of 6782878524816 is 2604396.

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

6782878524816 is a `hidden beast` number, since 6 + 7 + 8 + 2 + 87 + 8 + 524 + 8 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 311430963600 + 6471447561216 = 558060^2 + 2543904^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31144236 + ... + 31361268.

Almost surely, 2^{6782878524816} is an apocalyptic number.

6782878524816 is the 2604396-th square number.

It is an amenable number.

6782878524816 is an abundant number, since it is smaller than the sum of its proper divisors (12199848144753).

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

6782878524816 is an frugal number, since it uses more digits than its factorization.

6782878524816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434080 (or 217038 counting only the distinct ones).

The product of its digits is 578027520, while the sum is 72.

The spelling of 6782878524816 in words is "six trillion, seven hundred eighty-two billion, eight hundred seventy-eight million, five hundred twenty-four thousand, eight hundred sixteen".