6805155786 has 192 divisors, whose sum is σ = 17114042880. Its totient is φ = 1783192320.

The previous prime is 6805155781. The next prime is 6805155787. The reversal of 6805155786 is 6875515086.

It is not an unprimeable number, because it can be changed into a prime (6805155781) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34543840 + ... + 34544036.

It is an arithmetic number, because the mean of its divisors is an integer number (89135640).

Almost surely, 2^6805155786 is an apocalyptic number.

6805155786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6805155786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8557021440).

6805155786 is an abundant number, since it is smaller than the sum of its proper divisors (10308887094).

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

6805155786 is a wasteful number, since it uses less digits than its factorization.

6805155786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 51.

The square root of 6805155786 is about 82493.3681334445. The cubic root of 6805155786 is about 1895.0151683426.

The spelling of 6805155786 in words is "six billion, eight hundred five million, one hundred fifty-five thousand, seven hundred eighty-six".