1155540005 has 16 divisors (see below), whose sum is σ = 1473813120. Its totient is φ = 867267648.

The previous prime is 1155539999. The next prime is 1155540011. The reversal of 1155540005 is 5000455511.

It is an interprime number because it is at equal distance from previous prime (1155539999) and next prime (1155540011).

It is a cyclic number.

It is not a de Polignac number, because 1155540005 - 2¹⁶ = 1155474469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49262 + ... + 68831.

It is an arithmetic number, because the mean of its divisors is an integer number (92113320).

Almost surely, 2^1155540005 is an apocalyptic number.

It is an amenable number.

1155540005 is a deficient number, since it is larger than the sum of its proper divisors (318273115).

1155540005 is a wasteful number, since it uses less digits than its factorization.

1155540005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118220.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1155540005 is about 33993.2346945683. The cubic root of 1155540005 is about 1049.3692371841.

Adding to 1155540005 its reverse (5000455511), we get a palindrome (6155995516).

The spelling of 1155540005 in words is "one billion, one hundred fifty-five million, five hundred forty thousand, five".