1156983618 has 16 divisors (see below), whose sum is σ = 2644534080. Its totient is φ = 330566736.

The previous prime is 1156983613. The next prime is 1156983629. The reversal of 1156983618 is 8163896511.

It is a super-2 number, since 2×1156983618² = 2677222184640739848, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1156983613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13773573 + ... + 13773656.

It is an arithmetic number, because the mean of its divisors is an integer number (165283380).

Almost surely, 2^1156983618 is an apocalyptic number.

1156983618 is an abundant number, since it is smaller than the sum of its proper divisors (1487550462).

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

1156983618 is a wasteful number, since it uses less digits than its factorization.

1156983618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27547241.

The product of its digits is 311040, while the sum is 48.

The square root of 1156983618 is about 34014.4618949058. The cubic root of 1156983618 is about 1049.8060467153.

It can be divided in two parts, 115698 and 3618, that added together give a triangular number (119316 = T₄₈₈).

The spelling of 1156983618 in words is "one billion, one hundred fifty-six million, nine hundred eighty-three thousand, six hundred eighteen".