245691334689 has 16 divisors (see below), whose sum is σ = 343193324544. Its totient is φ = 156048530000.

The previous prime is 245691334673. The next prime is 245691334711. The reversal of 245691334689 is 986433196542.

It is a cyclic number.

It is not a de Polignac number, because 245691334689 - 2⁴ = 245691334673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245691334619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7075797 + ... + 7110434.

It is an arithmetic number, because the mean of its divisors is an integer number (21449582784).

Almost surely, 2^245691334689 is an apocalyptic number.

It is an amenable number.

245691334689 is a deficient number, since it is larger than the sum of its proper divisors (97501989855).

245691334689 is a wasteful number, since it uses less digits than its factorization.

245691334689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14186508.

The product of its digits is 33592320, while the sum is 60.

The spelling of 245691334689 in words is "two hundred forty-five billion, six hundred ninety-one million, three hundred thirty-four thousand, six hundred eighty-nine".