555566646040 has 128 divisors (see below), whose sum is σ = 1440617840640. Its totient is φ = 188879233536.

The previous prime is 555566645969. The next prime is 555566646043. The reversal of 555566646040 is 40646665555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555566646043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100880967 + ... + 100886473.

It is an arithmetic number, because the mean of its divisors is an integer number (11254826880).

Almost surely, 2^555566646040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555566646040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720308920320).

555566646040 is an abundant number, since it is smaller than the sum of its proper divisors (885051194600).

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

555566646040 is a wasteful number, since it uses less digits than its factorization.

555566646040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489 (or 8485 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 52.

The spelling of 555566646040 in words is "five hundred fifty-five billion, five hundred sixty-six million, six hundred forty-six thousand, forty".