6218561856 has 168 divisors, whose sum is σ = 18038734560. Its totient is φ = 1889531904.

The previous prime is 6218561837. The next prime is 6218561863. The reversal of 6218561856 is 6581658126.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2692030 + ... + 2694338.

It is an arithmetic number, because the mean of its divisors is an integer number (107373420).

Almost surely, 2^6218561856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6218561856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9019367280).

6218561856 is an abundant number, since it is smaller than the sum of its proper divisors (11820172704).

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

6218561856 is a wasteful number, since it uses less digits than its factorization.

6218561856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2410 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The square root of 6218561856 is about 78857.8585557584. The cubic root of 6218561856 is about 1838.9220466194.

The spelling of 6218561856 in words is "six billion, two hundred eighteen million, five hundred sixty-one thousand, eight hundred fifty-six".