5515661155500 has 192 divisors, whose sum is σ = 17860709193600. Its totient is φ = 1469649484800.

The previous prime is 5515661155489. The next prime is 5515661155549. The reversal of 5515661155500 is 55511665155.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16534356 + ... + 16864644.

It is an arithmetic number, because the mean of its divisors is an integer number (93024527050).

Almost surely, 2^{5515661155500} is an apocalyptic number.

5515661155500 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 5515661155500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8930354596800).

5515661155500 is an abundant number, since it is smaller than the sum of its proper divisors (12345048038100).

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

5515661155500 is a wasteful number, since it uses less digits than its factorization.

5515661155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331554 (or 331536 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 45.

The spelling of 5515661155500 in words is "five trillion, five hundred fifteen billion, six hundred sixty-one million, one hundred fifty-five thousand, five hundred".