1156091418 has 48 divisors (see below), whose sum is σ = 2576901600. Its totient is φ = 374316768.

The previous prime is 1156091359. The next prime is 1156091429. The reversal of 1156091418 is 8141906511.

It is a happy number.

1156091418 is a `hidden beast` number, since 1 + 1 + 5 + 609 + 1 + 41 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549733 + ... + 551831.

It is an arithmetic number, because the mean of its divisors is an integer number (53685450).

Almost surely, 2^1156091418 is an apocalyptic number.

1156091418 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 1156091418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288450800).

1156091418 is an abundant number, since it is smaller than the sum of its proper divisors (1420810182).

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

1156091418 is a wasteful number, since it uses less digits than its factorization.

1156091418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1156091418 is about 34001.3443557751. The cubic root of 1156091418 is about 1049.5361270714.

Adding to 1156091418 its reverse (8141906511), we get a palindrome (9297997929).

The spelling of 1156091418 in words is "one billion, one hundred fifty-six million, ninety-one thousand, four hundred eighteen".