6458990909 has 12 divisors (see below), whose sum is σ = 7655287644. Its totient is φ = 5431817664.

The previous prime is 6458990887. The next prime is 6458990921. The reversal of 6458990909 is 9090998546.

It can be written as a sum of positive squares in 2 ways, for example, as 3606362809 + 2852628100 = 60053^2 + 53410^2 .

It is not a de Polignac number, because 6458990909 - 2¹² = 6458986813 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6458990009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1240952 + ... + 1246145.

It is an arithmetic number, because the mean of its divisors is an integer number (637940637).

Almost surely, 2^6458990909 is an apocalyptic number.

It is an amenable number.

6458990909 is a deficient number, since it is larger than the sum of its proper divisors (1196296735).

6458990909 is a wasteful number, since it uses less digits than its factorization.

6458990909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487164 (or 2487157 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 59.

The square root of 6458990909 is about 80367.8474826843. The cubic root of 6458990909 is about 1862.3225033559.

The spelling of 6458990909 in words is "six billion, four hundred fifty-eight million, nine hundred ninety thousand, nine hundred nine".