1158865503 has 16 divisors (see below), whose sum is σ = 1636966656. Its totient is φ = 726721920.

The previous prime is 1158865483. The next prime is 1158865517. The reversal of 1158865503 is 3055688511.

It is not a de Polignac number, because 1158865503 - 2⁵ = 1158865471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158865573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103350 + ... + 114012.

It is an arithmetic number, because the mean of its divisors is an integer number (102310416).

Almost surely, 2^1158865503 is an apocalyptic number.

1158865503 is a deficient number, since it is larger than the sum of its proper divisors (478101153).

1158865503 is a wasteful number, since it uses less digits than its factorization.

1158865503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12814.

The product of its (nonzero) digits is 144000, while the sum is 42.

The square root of 1158865503 is about 34042.1136682198. The cubic root of 1158865503 is about 1050.3749237064.

The spelling of 1158865503 in words is "one billion, one hundred fifty-eight million, eight hundred sixty-five thousand, five hundred three".