8521696840 has 32 divisors (see below), whose sum is σ = 20182968000. Its totient is φ = 3229274304.

The previous prime is 8521696837. The next prime is 8521696873. The reversal of 8521696840 is 486961258.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 5605620 + ... + 5607139.

It is an arithmetic number, because the mean of its divisors is an integer number (630717750).

Almost surely, 2^8521696840 is an apocalyptic number.

It is an amenable number.

8521696840 is an abundant number, since it is smaller than the sum of its proper divisors (11661271160).

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

8521696840 is a wasteful number, since it uses less digits than its factorization.

8521696840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212789 (or 11212785 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 8521696840 is about 92313.0372157693. The cubic root of 8521696840 is about 2042.5625269065.

The spelling of 8521696840 in words is "eight billion, five hundred twenty-one million, six hundred ninety-six thousand, eight hundred forty".