1165061655 has 24 divisors (see below), whose sum is σ = 2020237440. Its totient is φ = 621120960.

The previous prime is 1165061647. The next prime is 1165061671. The reversal of 1165061655 is 5561605611.

It is not a de Polignac number, because 1165061655 - 2³ = 1165061647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205965 + ... + 211545.

It is an arithmetic number, because the mean of its divisors is an integer number (84176560).

Almost surely, 2^1165061655 is an apocalyptic number.

1165061655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165061655 is a deficient number, since it is larger than the sum of its proper divisors (855175785).

1165061655 is a wasteful number, since it uses less digits than its factorization.

1165061655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10231 (or 10228 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1165061655 is about 34132.9995019483. Note that the first 3 decimals coincide. The cubic root of 1165061655 is about 1052.2436242115.

The spelling of 1165061655 in words is "one billion, one hundred sixty-five million, sixty-one thousand, six hundred fifty-five".