5511155550 has 48 divisors (see below), whose sum is σ = 14037076272. Its totient is φ = 1429920000.

The previous prime is 5511155549. The next prime is 5511155567. The reversal of 5511155550 is 555511155.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490951 + ... + 502050.

It is an arithmetic number, because the mean of its divisors is an integer number (292439089).

Almost surely, 2^5511155550 is an apocalyptic number.

5511155550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5511155550 is an abundant number, since it is smaller than the sum of its proper divisors (8525920722).

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

5511155550 is a wasteful number, since it uses less digits than its factorization.

5511155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993053 (or 993048 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 33.

The square root of 5511155550 is about 74237.1574752159. The cubic root of 5511155550 is about 1766.3667852613.

The spelling of 5511155550 in words is "five billion, five hundred eleven million, one hundred fifty-five thousand, five hundred fifty".