555240221540 has 24 divisors (see below), whose sum is σ = 1168787309760. Its totient is φ = 221566023008.

The previous prime is 555240221521. The next prime is 555240221587. The reversal of 555240221540 is 45122042555.

It is a self number, because there is not a number n which added to its sum of digits gives 555240221540.

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, 33120512 + ... + 33137271.

It is an arithmetic number, because the mean of its divisors is an integer number (48699471240).

Almost surely, 2^555240221540 is an apocalyptic number.

It is an amenable number.

555240221540 is an abundant number, since it is smaller than the sum of its proper divisors (613547088220).

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

555240221540 is a wasteful number, since it uses less digits than its factorization.

555240221540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66258211 (or 66258209 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 555240221540 in words is "five hundred fifty-five billion, two hundred forty million, two hundred twenty-one thousand, five hundred forty".