489338671557 has 4 divisors (see below), whose sum is σ = 652451562080. Its totient is φ = 326225781036.

The previous prime is 489338671553. The next prime is 489338671681. The reversal of 489338671557 is 755176833984.

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 489338671557 - 2² = 489338671553 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 (489338671553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81556445257 + ... + 81556445262.

It is an arithmetic number, because the mean of its divisors is an integer number (163112890520).

Almost surely, 2^489338671557 is an apocalyptic number.

It is an amenable number.

489338671557 is a deficient number, since it is larger than the sum of its proper divisors (163112890523).

489338671557 is a wasteful number, since it uses less digits than its factorization.

489338671557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163112890522.

The product of its digits is 152409600, while the sum is 66.

The spelling of 489338671557 in words is "four hundred eighty-nine billion, three hundred thirty-eight million, six hundred seventy-one thousand, five hundred fifty-seven".