505000055550 has 192 divisors, whose sum is σ = 1307189620224. Its totient is φ = 128910528000.

The previous prime is 505000055537. The next prime is 505000055627. The reversal of 505000055550 is 55550000505.

It is a super-2 number, since 2×505000055550² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

505000055550 is a modest number, since divided by 55550 gives 5050 as remainder.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 91366887 + ... + 91372413.

It is an arithmetic number, because the mean of its divisors is an integer number (6808279272).

Almost surely, 2^505000055550 is an apocalyptic number.

505000055550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 505000055550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653594810112).

505000055550 is an abundant number, since it is smaller than the sum of its proper divisors (802189564674).

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

505000055550 is a wasteful number, since it uses less digits than its factorization.

505000055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843 (or 5838 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 30.

The spelling of 505000055550 in words is "five hundred five billion, fifty-five thousand, five hundred fifty".