641016489 has 4 divisors (see below), whose sum is σ = 854688656. Its totient is φ = 427344324.

The previous prime is 641016479. The next prime is 641016491. The reversal of 641016489 is 984610146.

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 641016489 - 2⁵ = 641016457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641016469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106836079 + ... + 106836084.

It is an arithmetic number, because the mean of its divisors is an integer number (213672164).

Almost surely, 2^641016489 is an apocalyptic number.

It is an amenable number.

641016489 is a deficient number, since it is larger than the sum of its proper divisors (213672167).

641016489 is a wasteful number, since it uses less digits than its factorization.

641016489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213672166.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 641016489 is about 25318.3034384218. The cubic root of 641016489 is about 862.2298761741.

The spelling of 641016489 in words is "six hundred forty-one million, sixteen thousand, four hundred eighty-nine".