8556557540 has 12 divisors (see below), whose sum is σ = 17968770876. Its totient is φ = 3422623008.

The previous prime is 8556557539. The next prime is 8556557557. The reversal of 8556557540 is 457556558.

It can be written as a sum of positive squares in 2 ways, for example, as 2049553984 + 6507003556 = 45272^2 + 80666^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213913919 + ... + 213913958.

It is an arithmetic number, because the mean of its divisors is an integer number (1497397573).

Almost surely, 2^8556557540 is an apocalyptic number.

It is an amenable number.

8556557540 is an abundant number, since it is smaller than the sum of its proper divisors (9412213336).

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

8556557540 is a wasteful number, since it uses less digits than its factorization.

8556557540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427827886 (or 427827884 counting only the distinct ones).

The product of its (nonzero) digits is 4200000, while the sum is 50.

The square root of 8556557540 is about 92501.6623634408. The cubic root of 8556557540 is about 2045.3439871850.

The spelling of 8556557540 in words is "eight billion, five hundred fifty-six million, five hundred fifty-seven thousand, five hundred forty".