6221791137 has 16 divisors (see below), whose sum is σ = 8402946048. Its totient is φ = 4094335440.

The previous prime is 6221791127. The next prime is 6221791141. The reversal of 6221791137 is 7311971226.

It is not a de Polignac number, because 6221791137 - 2¹¹ = 6221789089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6221791095 and 6221791104.

It is not an unprimeable number, because it can be changed into a prime (6221791127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294312 + ... + 314742.

It is an arithmetic number, because the mean of its divisors is an integer number (525184128).

Almost surely, 2^6221791137 is an apocalyptic number.

It is an amenable number.

6221791137 is a deficient number, since it is larger than the sum of its proper divisors (2181154911).

6221791137 is a wasteful number, since it uses less digits than its factorization.

6221791137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21740.

The product of its digits is 31752, while the sum is 39.

The square root of 6221791137 is about 78878.3312260091. The cubic root of 6221791137 is about 1839.2403071502.

The spelling of 6221791137 in words is "six billion, two hundred twenty-one million, seven hundred ninety-one thousand, one hundred thirty-seven".