489311756121 has 4 divisors (see below), whose sum is σ = 652415674832. Its totient is φ = 326207837412.

The previous prime is 489311756111. The next prime is 489311756147. The reversal of 489311756121 is 121657113984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 489311756121 - 2¹¹ = 489311754073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489311756111) 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, 81551959351 + ... + 81551959356.

It is an arithmetic number, because the mean of its divisors is an integer number (163103918708).

Almost surely, 2^489311756121 is an apocalyptic number.

It is an amenable number.

489311756121 is a deficient number, since it is larger than the sum of its proper divisors (163103918711).

489311756121 is a wasteful number, since it uses less digits than its factorization.

489311756121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163103918710.

The product of its digits is 362880, while the sum is 48.

The spelling of 489311756121 in words is "four hundred eighty-nine billion, three hundred eleven million, seven hundred fifty-six thousand, one hundred twenty-one".