55505051500 has 96 divisors (see below), whose sum is σ = 127886653440. Its totient is φ = 20986776000.

The previous prime is 55505051453. The next prime is 55505051509. The reversal of 55505051500 is 515050555.

It is not an unprimeable number, because it can be changed into a prime (55505051509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4430245 + ... + 4442755.

It is an arithmetic number, because the mean of its divisors is an integer number (1332152640).

Almost surely, 2^55505051500 is an apocalyptic number.

55505051500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55505051500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63943326720).

55505051500 is an abundant number, since it is smaller than the sum of its proper divisors (72381601940).

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

55505051500 is a wasteful number, since it uses less digits than its factorization.

55505051500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13016 (or 13004 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 55505051500 in words is "fifty-five billion, five hundred five million, fifty-one thousand, five hundred".