489691104545 has 4 divisors (see below), whose sum is σ = 587629325460. Its totient is φ = 391752883632.

The previous prime is 489691104541. The next prime is 489691104571. The reversal of 489691104545 is 545401196984.

It is a happy number.

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 374123062336 + 115568042209 = 611656^2 + 339953^2 .

It is a cyclic number.

It is not a de Polignac number, because 489691104545 - 2² = 489691104541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489691104541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48969110450 + ... + 48969110459.

It is an arithmetic number, because the mean of its divisors is an integer number (146907331365).

Almost surely, 2^489691104545 is an apocalyptic number.

It is an amenable number.

489691104545 is a deficient number, since it is larger than the sum of its proper divisors (97938220915).

489691104545 is an equidigital number, since it uses as much as digits as its factorization.

489691104545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97938220914.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 489691104545 in words is "four hundred eighty-nine billion, six hundred ninety-one million, one hundred four thousand, five hundred forty-five".