7844427425 has 6 divisors (see below), whose sum is σ = 9727090038. Its totient is φ = 6275541920.

The previous prime is 7844427401. The next prime is 7844427427. The reversal of 7844427425 is 5247244487.

It can be written as a sum of positive squares in 3 ways, for example, as 930006016 + 6914421409 = 30496^2 + 83153^2 .

It is not a de Polignac number, because 7844427425 - 2¹⁸ = 7844165281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7844427425.

It is not an unprimeable number, because it can be changed into a prime (7844427427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156888524 + ... + 156888573.

It is an arithmetic number, because the mean of its divisors is an integer number (1621181673).

Almost surely, 2^7844427425 is an apocalyptic number.

It is an amenable number.

7844427425 is a deficient number, since it is larger than the sum of its proper divisors (1882662613).

7844427425 is a wasteful number, since it uses less digits than its factorization.

7844427425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313777107 (or 313777102 counting only the distinct ones).

The product of its digits is 2007040, while the sum is 47.

The square root of 7844427425 is about 88568.7722902378. The cubic root of 7844427425 is about 1986.9506613056.

The spelling of 7844427425 in words is "seven billion, eight hundred forty-four million, four hundred twenty-seven thousand, four hundred twenty-five".