8421691258 has 8 divisors (see below), whose sum is σ = 12697991028. Its totient is φ = 4189027584.

The previous prime is 8421691231. The next prime is 8421691259. The reversal of 8421691258 is 8521961248.

It can be written as a sum of positive squares in 2 ways, for example, as 8407606249 + 14085009 = 91693^2 + 3753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8421691259) 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, 10908541 + ... + 10909312.

Almost surely, 2^8421691258 is an apocalyptic number.

8421691258 is a deficient number, since it is larger than the sum of its proper divisors (4276299770).

8421691258 is a wasteful number, since it uses less digits than its factorization.

8421691258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21818048.

The product of its digits is 276480, while the sum is 46.

The square root of 8421691258 is about 91769.7731172961. The cubic root of 8421691258 is about 2034.5409648669.

The spelling of 8421691258 in words is "eight billion, four hundred twenty-one million, six hundred ninety-one thousand, two hundred fifty-eight".