6855780072 has 16 divisors (see below), whose sum is σ = 17139450240. Its totient is φ = 2285260016.

The previous prime is 6855780049. The next prime is 6855780083. The reversal of 6855780072 is 2700875586.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142828728 + ... + 142828775.

It is an arithmetic number, because the mean of its divisors is an integer number (1071215640).

Almost surely, 2^6855780072 is an apocalyptic number.

It is an amenable number.

6855780072 is an abundant number, since it is smaller than the sum of its proper divisors (10283670168).

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

6855780072 is a wasteful number, since it uses less digits than its factorization.

6855780072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285657512 (or 285657508 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 6855780072 is about 82799.6381151512. The cubic root of 6855780072 is about 1899.7026378586.

The spelling of 6855780072 in words is "six billion, eight hundred fifty-five million, seven hundred eighty thousand, seventy-two".