6221128776 has 16 divisors (see below), whose sum is σ = 15552822000. Its totient is φ = 2073709584.

The previous prime is 6221128769. The next prime is 6221128777. The reversal of 6221128776 is 6778211226.

It is not an unprimeable number, because it can be changed into a prime (6221128777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129606826 + ... + 129606873.

It is an arithmetic number, because the mean of its divisors is an integer number (972051375).

Almost surely, 2^6221128776 is an apocalyptic number.

It is an amenable number.

6221128776 is an abundant number, since it is smaller than the sum of its proper divisors (9331693224).

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

6221128776 is a wasteful number, since it uses less digits than its factorization.

6221128776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259213708 (or 259213704 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 6221128776 is about 78874.1324896826. The cubic root of 6221128776 is about 1839.1750373988.

The spelling of 6221128776 in words is "six billion, two hundred twenty-one million, one hundred twenty-eight thousand, seven hundred seventy-six".