8531405916560 has 20 divisors (see below), whose sum is σ = 19835518756188. Its totient is φ = 3412562366592.

The previous prime is 8531405916541. The next prime is 8531405916563. The reversal of 8531405916560 is 656195041358.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5213805957376 + 3317599959184 = 2283376^2 + 1821428^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×8531405916560² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8531405916563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53321286899 + ... + 53321287058.

Almost surely, 2^{8531405916560} is an apocalyptic number.

8531405916560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8531405916560 is an abundant number, since it is smaller than the sum of its proper divisors (11304112839628).

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

8531405916560 is a wasteful number, since it uses less digits than its factorization.

8531405916560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106642573970 (or 106642573964 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 8531405916560 in words is "eight trillion, five hundred thirty-one billion, four hundred five million, nine hundred sixteen thousand, five hundred sixty".