8286640021 has 8 divisors (see below), whose sum is σ = 9571734144. Its totient is φ = 7090173120.

The previous prime is 8286639971. The next prime is 8286640027. The reversal of 8286640021 is 1200466828.

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

It is a cyclic number.

It is not a de Polignac number, because 8286640021 - 2¹⁵ = 8286607253 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 (8286640027) 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, 22156605 + ... + 22156978.

It is an arithmetic number, because the mean of its divisors is an integer number (1196466768).

Almost surely, 2^8286640021 is an apocalyptic number.

It is an amenable number.

8286640021 is a deficient number, since it is larger than the sum of its proper divisors (1285094123).

8286640021 is a wasteful number, since it uses less digits than its factorization.

8286640021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44313611.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 8286640021 is about 91030.9838516535. The cubic root of 8286640021 is about 2023.6069285590.

The spelling of 8286640021 in words is "eight billion, two hundred eighty-six million, six hundred forty thousand, twenty-one".