55500555505500 has 576 divisors, whose sum is σ = 205456090484736. Its totient is φ = 12347591040000.

The previous prime is 55500555505429. The next prime is 55500555505511. The reversal of 55500555505500 is 550555500555.

It is a super-2 number, since 2×55500555505500² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 556586647 + ... + 556686353.

It is an arithmetic number, because the mean of its divisors is an integer number (356694601536).

Almost surely, 2^{55500555505500} is an apocalyptic number.

55500555505500 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 55500555505500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102728045242368).

55500555505500 is an abundant number, since it is smaller than the sum of its proper divisors (149955534979236).

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

55500555505500 is a wasteful number, since it uses less digits than its factorization.

55500555505500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100211 (or 100196 counting only the distinct ones).

The product of its (nonzero) digits is 1953125, while the sum is 45.

The spelling of 55500555505500 in words is "fifty-five trillion, five hundred billion, five hundred fifty-five million, five hundred five thousand, five hundred".