6221647776 has 48 divisors (see below), whose sum is σ = 16336180224. Its totient is φ = 2073329664.

The previous prime is 6221647771. The next prime is 6221647807. The reversal of 6221647776 is 6777461226.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is not an unprimeable number, because it can be changed into a prime (6221647771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522400 + ... + 534176.

It is an arithmetic number, because the mean of its divisors is an integer number (340337088).

Almost surely, 2^6221647776 is an apocalyptic number.

It is an amenable number.

6221647776 is an abundant number, since it is smaller than the sum of its proper divisors (10114532448).

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

6221647776 is a wasteful number, since it uses less digits than its factorization.

6221647776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17293 (or 17285 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 48.

The square root of 6221647776 is about 78877.4224731006. The cubic root of 6221647776 is about 1839.2261805989.

The spelling of 6221647776 in words is "six billion, two hundred twenty-one million, six hundred forty-seven thousand, seven hundred seventy-six".