488909909885 has 4 divisors (see below), whose sum is σ = 586691891868. Its totient is φ = 391127927904.

The previous prime is 488909909881. The next prime is 488909909903. The reversal of 488909909885 is 588909909884.

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 162295373881 + 326614536004 = 402859^2 + 571502^2 .

It is a cyclic number.

It is not a de Polignac number, because 488909909885 - 2² = 488909909881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (488909909881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48890990984 + ... + 48890990993.

It is an arithmetic number, because the mean of its divisors is an integer number (146672972967).

Almost surely, 2^488909909885 is an apocalyptic number.

It is an amenable number.

488909909885 is a deficient number, since it is larger than the sum of its proper divisors (97781981983).

488909909885 is an equidigital number, since it uses as much as digits as its factorization.

488909909885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97781981982.

The product of its (nonzero) digits is 537477120, while the sum is 77.

Subtracting 488909909885 from its reverse (588909909884), we obtain a palindrome (99999999999).

The spelling of 488909909885 in words is "four hundred eighty-eight billion, nine hundred nine million, nine hundred nine thousand, eight hundred eighty-five".