2645250625 has 20 divisors (see below), whose sum is σ = 3339659092. Its totient is φ = 2094336000.

The previous prime is 2645250607. The next prime is 2645250637. The reversal of 2645250625 is 5260525462.

It is a Cunningham number, because it is equal to 51432²+1.

It can be written as a sum of positive squares in 10 ways, for example, as 1457483329 + 1187767296 = 38177^2 + 34464^2 .

It is not a de Polignac number, because 2645250625 - 2⁷ = 2645250497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38809 + ... + 82441.

Almost surely, 2^2645250625 is an apocalyptic number.

2645250625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2645250625 is a deficient number, since it is larger than the sum of its proper divisors (694408467).

2645250625 is an frugal number, since it uses more digits than its factorization.

2645250625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43750 (or 43735 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 2645250625 is about 51432.0000097216. Note that the first 5 decimals coincide. The cubic root of 2645250625 is about 1383.0003028894. Note that the first 3 decimals are identical.

It can be divided in two parts, 26452 and 50625, that added together give a palindrome (77077).

The spelling of 2645250625 in words is "two billion, six hundred forty-five million, two hundred fifty thousand, six hundred twenty-five".