245173321061217 has 12 divisors (see below), whose sum is σ = 354169169789604. Its totient is φ = 163435067665920.

The previous prime is 245173321061197. The next prime is 245173321061243. The reversal of 245173321061217 is 712160123371542.

245173321061217 is a `hidden beast` number, since 2 + 4 + 5 + 1 + 7 + 3 + 3 + 2 + 10 + 612 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 186536566149921 + 58636754911296 = 13657839^2 + 7657464^2 .

It is not a de Polignac number, because 245173321061217 - 2⁸ = 245173321060961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245173321061117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1150974384 + ... + 1151187377.

It is an arithmetic number, because the mean of its divisors is an integer number (29514097482467).

Almost surely, 2^{245173321061217} is an apocalyptic number.

It is an amenable number.

245173321061217 is a deficient number, since it is larger than the sum of its proper divisors (108995848728387).

245173321061217 is a wasteful number, since it uses less digits than its factorization.

245173321061217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302173600 (or 2302173597 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 245173321061217 in words is "two hundred forty-five trillion, one hundred seventy-three billion, three hundred twenty-one million, sixty-one thousand, two hundred seventeen".