1155500056550 has 96 divisors (see below), whose sum is σ = 2609262163200. Its totient is φ = 371876780160.

The previous prime is 1155500056511. The next prime is 1155500056561. The reversal of 1155500056550 is 556500055511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72212 + ... + 1521911.

It is an arithmetic number, because the mean of its divisors is an integer number (27179814200).

Almost surely, 2^{1155500056550} is an apocalyptic number.

1155500056550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155500056550 is an abundant number, since it is smaller than the sum of its proper divisors (1453762106650).

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

1155500056550 is a wasteful number, since it uses less digits than its factorization.

1155500056550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594270 (or 1594265 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 1155500056550 in words is "one trillion, one hundred fifty-five billion, five hundred million, fifty-six thousand, five hundred fifty".