1155135581566 has 8 divisors (see below), whose sum is σ = 1734711142464. Its totient is φ = 576898534080.

The previous prime is 1155135581531. The next prime is 1155135581581. The reversal of 1155135581566 is 6651855315511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334626195 + ... + 334629646.

It is an arithmetic number, because the mean of its divisors is an integer number (216838892808).

Almost surely, 2^{1155135581566} is an apocalyptic number.

1155135581566 is a deficient number, since it is larger than the sum of its proper divisors (579575560898).

1155135581566 is an equidigital number, since it uses as much as digits as its factorization.

1155135581566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669256706.

The product of its digits is 2700000, while the sum is 52.

The spelling of 1155135581566 in words is "one trillion, one hundred fifty-five billion, one hundred thirty-five million, five hundred eighty-one thousand, five hundred sixty-six".