8557421540 has 12 divisors (see below), whose sum is σ = 17970585276. Its totient is φ = 3422968608.

The previous prime is 8557421527. The next prime is 8557421573. The reversal of 8557421540 is 451247558.

It can be written as a sum of positive squares in 2 ways, for example, as 3102712804 + 5454708736 = 55702^2 + 73856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213935519 + ... + 213935558.

It is an arithmetic number, because the mean of its divisors is an integer number (1497548773).

Almost surely, 2^8557421540 is an apocalyptic number.

It is an amenable number.

8557421540 is an abundant number, since it is smaller than the sum of its proper divisors (9413163736).

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

8557421540 is a wasteful number, since it uses less digits than its factorization.

8557421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427871086 (or 427871084 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 41.

The square root of 8557421540 is about 92506.3324318935. The cubic root of 8557421540 is about 2045.4128278654.

The spelling of 8557421540 in words is "eight billion, five hundred fifty-seven million, four hundred twenty-one thousand, five hundred forty".