8521039870 has 16 divisors (see below), whose sum is σ = 17528996448. Its totient is φ = 2921499360.

The previous prime is 8521039853. The next prime is 8521039883. The reversal of 8521039870 is 789301258.

It is a super-2 number, since 2×8521039870² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60864501 + ... + 60864640.

It is an arithmetic number, because the mean of its divisors is an integer number (1095562278).

Almost surely, 2^8521039870 is an apocalyptic number.

8521039870 is an abundant number, since it is smaller than the sum of its proper divisors (9007956578).

8521039870 is a wasteful number, since it uses less digits than its factorization.

8521039870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121729155.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 8521039870 is about 92309.4787657259. The cubic root of 8521039870 is about 2042.5100359213.

The spelling of 8521039870 in words is "eight billion, five hundred twenty-one million, thirty-nine thousand, eight hundred seventy".