1181883645 has 48 divisors (see below), whose sum is σ = 2072304000. Its totient is φ = 623091840.

The previous prime is 1181883643. The next prime is 1181883701. The reversal of 1181883645 is 5463881811.

It is not a de Polignac number, because 1181883645 - 2¹ = 1181883643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1181883645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181883643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2406850 + ... + 2407340.

It is an arithmetic number, because the mean of its divisors is an integer number (43173000).

Almost surely, 2^1181883645 is an apocalyptic number.

1181883645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1181883645 is a deficient number, since it is larger than the sum of its proper divisors (890420355).

1181883645 is a wasteful number, since it uses less digits than its factorization.

1181883645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1007 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 1181883645 is about 34378.5346546359. The cubic root of 1181883645 is about 1057.2837912864.

The spelling of 1181883645 in words is "one billion, one hundred eighty-one million, eight hundred eighty-three thousand, six hundred forty-five".