1158654618 has 288 divisors, whose sum is σ = 3241667520. Its totient is φ = 307929600.

The previous prime is 1158654617. The next prime is 1158654641. The reversal of 1158654618 is 8164568511.

1158654618 is a `hidden beast` number, since 1 + 1 + 586 + 5 + 4 + 61 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1158654617) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 18994308 + ... + 18994368.

It is an arithmetic number, because the mean of its divisors is an integer number (11255790).

Almost surely, 2^1158654618 is an apocalyptic number.

1158654618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158654618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620833760).

1158654618 is an abundant number, since it is smaller than the sum of its proper divisors (2083012902).

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

1158654618 is a wasteful number, since it uses less digits than its factorization.

1158654618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 113 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 1158654618 is about 34039.0161138656. The cubic root of 1158654618 is about 1050.3112057129.

The spelling of 1158654618 in words is "one billion, one hundred fifty-eight million, six hundred fifty-four thousand, six hundred eighteen".