1155605655 has 16 divisors (see below), whose sum is σ = 1879281504. Its totient is φ = 606218880.

The previous prime is 1155605621. The next prime is 1155605663. The reversal of 1155605655 is 5565065511.

It is not a de Polignac number, because 1155605655 - 2⁷ = 1155605527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630564 + ... + 632393.

It is an arithmetic number, because the mean of its divisors is an integer number (117455094).

Almost surely, 2^1155605655 is an apocalyptic number.

1155605655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155605655 is a deficient number, since it is larger than the sum of its proper divisors (723675849).

1155605655 is a wasteful number, since it uses less digits than its factorization.

1155605655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263026.

The product of its (nonzero) digits is 112500, while the sum is 39.

The square root of 1155605655 is about 33994.2003141712. The cubic root of 1155605655 is about 1049.3891095052.

The spelling of 1155605655 in words is "one billion, one hundred fifty-five million, six hundred five thousand, six hundred fifty-five".