2645249125 has 16 divisors (see below), whose sum is σ = 3302730288. Its totient is φ = 2115264000.

The previous prime is 2645249119. The next prime is 2645249137. The reversal of 2645249125 is 5219425462.

It can be written as a sum of positive squares in 8 ways, for example, as 1543075524 + 1102173601 = 39282^2 + 33199^2 .

It is not a de Polignac number, because 2645249125 - 2⁷ = 2645248997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476365 + ... + 481885.

It is an arithmetic number, because the mean of its divisors is an integer number (206420643).

Almost surely, 2^2645249125 is an apocalyptic number.

2645249125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2645249125 is a deficient number, since it is larger than the sum of its proper divisors (657481163).

2645249125 is an equidigital number, since it uses as much as digits as its factorization.

2645249125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9369 (or 9359 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 2645249125 is about 51431.9854273583. The cubic root of 2645249125 is about 1383.0000414774. Note that the first 4 decimals are identical.

The spelling of 2645249125 in words is "two billion, six hundred forty-five million, two hundred forty-nine thousand, one hundred twenty-five".