6911428225 has 27 divisors (see below), whose sum is σ = 9287387433. Its totient is φ = 5099833440.

The previous prime is 6911428213. The next prime is 6911428243. The reversal of 6911428225 is 5228241196.

It is a happy number.

The square root of 6911428225 is 83135.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1781430849 + 5129997376 = 42207^2 + 71624^2 .

It is not a de Polignac number, because 6911428225 - 2⁹ = 6911427713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5403136 + ... + 5404414.

Almost surely, 2^6911428225 is an apocalyptic number.

6911428225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6911428225 is the 83135-th square number.

6911428225 is the 41568-th centered octagonal number.

It is an amenable number.

6911428225 is a deficient number, since it is larger than the sum of its proper divisors (2375959208).

6911428225 is an equidigital number, since it uses as much as digits as its factorization.

6911428225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 1297 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The cubic root of 6911428225 is about 1904.8287356683.

The spelling of 6911428225 in words is "six billion, nine hundred eleven million, four hundred twenty-eight thousand, two hundred twenty-five".