8720545536 has 90 divisors (see below), whose sum is σ = 26003150712. Its totient is φ = 2906841600.

The previous prime is 8720545523. The next prime is 8720545541. The reversal of 8720545536 is 6355450278.

8720545536 is a `hidden beast` number, since 8 + 72 + 0 + 5 + 45 + 536 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8720545491 and 8720545500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 189540 + ... + 231011.

Almost surely, 2^8720545536 is an apocalyptic number.

It is an amenable number.

8720545536 is an abundant number, since it is smaller than the sum of its proper divisors (17282605176).

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

8720545536 is an equidigital number, since it uses as much as digits as its factorization.

8720545536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420579 (or 420556 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The square root of 8720545536 is about 93383.8612180927. The cubic root of 8720545536 is about 2058.3278553569.

The spelling of 8720545536 in words is "eight billion, seven hundred twenty million, five hundred forty-five thousand, five hundred thirty-six".