1155505365 has 32 divisors (see below), whose sum is σ = 2347695360. Its totient is φ = 528230592.

The previous prime is 1155505363. The next prime is 1155505367. The reversal of 1155505365 is 5635055511.

1155505365 is a `hidden beast` number, since 115 + 5 + 5 + 0 + 536 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1155505363) and next prime (1155505367).

It is not a de Polignac number, because 1155505365 - 2¹ = 1155505363 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155505363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 610434 + ... + 612323.

It is an arithmetic number, because the mean of its divisors is an integer number (73365480).

Almost surely, 2^1155505365 is an apocalyptic number.

1155505365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155505365 is an abundant number, since it is smaller than the sum of its proper divisors (1192189995).

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

1155505365 is a wasteful number, since it uses less digits than its factorization.

1155505365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222778 (or 1222772 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 36.

The square root of 1155505365 is about 33992.7251776023. The cubic root of 1155505365 is about 1049.3587513179.

The spelling of 1155505365 in words is "one billion, one hundred fifty-five million, five hundred five thousand, three hundred sixty-five".