5558999640 has 96 divisors (see below), whose sum is σ = 16910525520. Its totient is φ = 1461924864.

The previous prime is 5558999627. The next prime is 5558999657. The reversal of 5558999640 is 469998555.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 635134 + ... + 643826.

Almost surely, 2^5558999640 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 5558999640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8455262760).

5558999640 is an abundant number, since it is smaller than the sum of its proper divisors (11351525880).

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

5558999640 is a wasteful number, since it uses less digits than its factorization.

5558999640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8853 (or 8776 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 60.

The square root of 5558999640 is about 74558.6992912296. The cubic root of 5558999640 is about 1771.4635282854.

The spelling of 5558999640 in words is "five billion, five hundred fifty-eight million, nine hundred ninety-nine thousand, six hundred forty".