6919744225 has 27 divisors (see below), whose sum is σ = 8715101331. Its totient is φ = 5450281200.

The previous prime is 6919744213. The next prime is 6919744253. The reversal of 6919744225 is 5224479196.

It is a happy number.

The square root of 6919744225 is 83185.

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

It can be written as a sum of positive squares in only one way, i.e., 2491107921 + 4428636304 = 49911^2 + 66548^2 .

It is not a de Polignac number, because 6919744225 - 2¹⁵ = 6919711457 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, 52822410 + ... + 52822540.

Almost surely, 2^6919744225 is an apocalyptic number.

6919744225 is the 83185-th square number.

6919744225 is the 41593-rd centered octagonal number.

It is an amenable number.

6919744225 is a deficient number, since it is larger than the sum of its proper divisors (1795357106).

6919744225 is an equidigital number, since it uses as much as digits as its factorization.

6919744225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 263 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The cubic root of 6919744225 is about 1905.5924083490.

Multiplying 6919744225 by its sum of digits (49), we get a square (339067467025 = 582295²).

The spelling of 6919744225 in words is "six billion, nine hundred nineteen million, seven hundred forty-four thousand, two hundred twenty-five".