5551855550 has 24 divisors (see below), whose sum is σ = 10605548136. Its totient is φ = 2160721440.

The previous prime is 5551855549. The next prime is 5551855559. The reversal of 5551855550 is 555581555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551855559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1498652 + ... + 1502351.

It is an arithmetic number, because the mean of its divisors is an integer number (441897839).

Almost surely, 2^5551855550 is an apocalyptic number.

5551855550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5551855550 is a deficient number, since it is larger than the sum of its proper divisors (5053692586).

5551855550 is a wasteful number, since it uses less digits than its factorization.

5551855550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001052 (or 3001047 counting only the distinct ones).

The product of its (nonzero) digits is 625000, while the sum is 44.

The square root of 5551855550 is about 74510.7747241968. The cubic root of 5551855550 is about 1770.7043437240.

The spelling of 5551855550 in words is "five billion, five hundred fifty-one million, eight hundred fifty-five thousand, five hundred fifty".