8521371040 has 384 divisors, whose sum is σ = 26519270400. Its totient is φ = 2510880768.

The previous prime is 8521371011. The next prime is 8521371059. The reversal of 8521371040 is 401731258.

It is a super-2 number, since 2×8521371040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8521370993 and 8521371011.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42820861 + ... + 42821059.

It is an arithmetic number, because the mean of its divisors is an integer number (69060600).

Almost surely, 2^8521371040 is an apocalyptic number.

8521371040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8521371040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13259635200).

8521371040 is an abundant number, since it is smaller than the sum of its proper divisors (17997899360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8521371040 is a wasteful number, since it uses less digits than its factorization.

8521371040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 8521371040 is about 92311.2725510812. The cubic root of 8521371040 is about 2042.5364962789.

The spelling of 8521371040 in words is "eight billion, five hundred twenty-one million, three hundred seventy-one thousand, forty".