1155554865345 has 16 divisors (see below), whose sum is σ = 1862189138880. Its totient is φ = 611862143424.

The previous prime is 1155554865313. The next prime is 1155554865359. The reversal of 1155554865345 is 5435684555511.

It is a happy number.

It is not a de Polignac number, because 1155554865345 - 2⁵ = 1155554865313 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277109394 + ... + 277113563.

It is an arithmetic number, because the mean of its divisors is an integer number (116386821180).

Almost surely, 2^{1155554865345} is an apocalyptic number.

1155554865345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155554865345 is a deficient number, since it is larger than the sum of its proper divisors (706634273535).

1155554865345 is a wasteful number, since it uses less digits than its factorization.

1155554865345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554223104.

The product of its digits is 36000000, while the sum is 57.

The spelling of 1155554865345 in words is "one trillion, one hundred fifty-five billion, five hundred fifty-four million, eight hundred sixty-five thousand, three hundred forty-five".