6221878784 has 40 divisors (see below), whose sum is σ = 13561763688. Its totient is φ = 2828124160.

The previous prime is 6221878763. The next prime is 6221878799. The reversal of 6221878784 is 4878781226.

It is a congruent number.

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, 546737 + ... + 558000.

Almost surely, 2^6221878784 is an apocalyptic number.

6221878784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6221878784 is an abundant number, since it is smaller than the sum of its proper divisors (7339884904).

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

6221878784 is a wasteful number, since it uses less digits than its factorization.

6221878784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104766 (or 1104750 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 53.

The square root of 6221878784 is about 78878.8868075609. The cubic root of 6221878784 is about 1839.2489436309.

The spelling of 6221878784 in words is "six billion, two hundred twenty-one million, eight hundred seventy-eight thousand, seven hundred eighty-four".