245884081689 has 27 divisors (see below), whose sum is σ = 360692205237. Its totient is φ = 161410658904.

The previous prime is 245884081679. The next prime is 245884081691. The reversal of 245884081689 is 986180488542.

The square root of 245884081689 is 495867.

It is a perfect power (a square), and thus also a powerful number.

245884081689 is a `hidden beast` number, since 2 + 4 + 588 + 40 + 8 + 1 + 6 + 8 + 9 = 666.

It is not a de Polignac number, because 245884081689 - 2¹⁹ = 245883557401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245884081679) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 99668034 + ... + 99670500.

Almost surely, 2^245884081689 is an apocalyptic number.

245884081689 is the 495867-th square number.

245884081689 is the 247934-th centered octagonal number.

It is an amenable number.

245884081689 is a deficient number, since it is larger than the sum of its proper divisors (114808123548).

245884081689 is an frugal number, since it uses more digits than its factorization.

245884081689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 35389440, while the sum is 63.

The spelling of 245884081689 in words is "two hundred forty-five billion, eight hundred eighty-four million, eighty-one thousand, six hundred eighty-nine".