245867210161 has 4 divisors (see below), whose sum is σ = 245889062692. Its totient is φ = 245845357632.

The previous prime is 245867210119. The next prime is 245867210201. The reversal of 245867210161 is 161012768542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 233705531761 + 12161678400 = 483431^2 + 110280^2 .

It is a cyclic number.

It is not a de Polignac number, because 245867210161 - 2¹⁹ = 245866685873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245867280161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10909380 + ... + 10931893.

It is an arithmetic number, because the mean of its divisors is an integer number (61472265673).

Almost surely, 2^245867210161 is an apocalyptic number.

It is an amenable number.

245867210161 is a deficient number, since it is larger than the sum of its proper divisors (21852531).

245867210161 is a wasteful number, since it uses less digits than its factorization.

245867210161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21852530.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 245867210161 in words is "two hundred forty-five billion, eight hundred sixty-seven million, two hundred ten thousand, one hundred sixty-one".