245651025665 has 16 divisors (see below), whose sum is σ = 295961048208. Its totient is φ = 195735065856.

The previous prime is 245651025619. The next prime is 245651025677. The reversal of 245651025665 is 566520156542.

It can be written as a sum of positive squares in 8 ways, for example, as 67131255409 + 178519770256 = 259097^2 + 422516^2 .

It is a cyclic number.

It is not a de Polignac number, because 245651025665 - 2¹² = 245651021569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2490467 + ... + 2587223.

It is an arithmetic number, because the mean of its divisors is an integer number (18497565513).

Almost surely, 2^245651025665 is an apocalyptic number.

It is an amenable number.

245651025665 is a deficient number, since it is larger than the sum of its proper divisors (50310022543).

245651025665 is a wasteful number, since it uses less digits than its factorization.

245651025665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98788.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 245651025665 in words is "two hundred forty-five billion, six hundred fifty-one million, twenty-five thousand, six hundred sixty-five".