2617661225 has 6 divisors (see below), whose sum is σ = 3245899950. Its totient is φ = 2094128960.

The previous prime is 2617661197. The next prime is 2617661239. The reversal of 2617661225 is 5221667162.

It can be written as a sum of positive squares in 3 ways, for example, as 15335056 + 2602326169 = 3916^2 + 51013^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2617661225 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52353200 + ... + 52353249.

It is an arithmetic number, because the mean of its divisors is an integer number (540983325).

Almost surely, 2^2617661225 is an apocalyptic number.

2617661225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2617661225 is a deficient number, since it is larger than the sum of its proper divisors (628238725).

2617661225 is a wasteful number, since it uses less digits than its factorization.

2617661225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104706459 (or 104706454 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 2617661225 is about 51163.0845923113. The cubic root of 2617661225 is about 1378.1753566611.

The spelling of 2617661225 in words is "two billion, six hundred seventeen million, six hundred sixty-one thousand, two hundred twenty-five".