8458512821 has 8 divisors (see below), whose sum is σ = 9628663104. Its totient is φ = 7355228320.

The previous prime is 8458512787. The next prime is 8458512823. The reversal of 8458512821 is 1282158548.

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

It is not a de Polignac number, because 8458512821 - 2¹⁰ = 8458511797 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 (8458512823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16716176 + ... + 16716681.

It is an arithmetic number, because the mean of its divisors is an integer number (1203582888).

Almost surely, 2^8458512821 is an apocalyptic number.

It is an amenable number.

8458512821 is a deficient number, since it is larger than the sum of its proper divisors (1170150283).

8458512821 is a wasteful number, since it uses less digits than its factorization.

8458512821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33432891.

The product of its digits is 204800, while the sum is 44.

The square root of 8458512821 is about 91970.1735401211. The cubic root of 8458512821 is about 2037.5018135706.

The spelling of 8458512821 in words is "eight billion, four hundred fifty-eight million, five hundred twelve thousand, eight hundred twenty-one".