2644040425 has 48 divisors (see below), whose sum is σ = 3612237552. Its totient is φ = 1907942400.

The previous prime is 2644040407. The next prime is 2644040449. The reversal of 2644040425 is 5240404462.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 1225840144 + 1418200281 = 35012^2 + 37659^2 .

It is not a de Polignac number, because 2644040425 - 2⁵ = 2644040393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3905187 + ... + 3905863.

It is an arithmetic number, because the mean of its divisors is an integer number (75254949).

Almost surely, 2^2644040425 is an apocalyptic number.

2644040425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2644040425 is a deficient number, since it is larger than the sum of its proper divisors (968197127).

2644040425 is a wasteful number, since it uses less digits than its factorization.

2644040425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 2644040425 is about 51420.2336147941. The cubic root of 2644040425 is about 1382.7893635483.

Adding to 2644040425 its reverse (5240404462), we get a palindrome (7884444887).

The spelling of 2644040425 in words is "two billion, six hundred forty-four million, forty thousand, four hundred twenty-five".