1163220645 has 8 divisors (see below), whose sum is σ = 1861153056. Its totient is φ = 620384336.

The previous prime is 1163220637. The next prime is 1163220673. The reversal of 1163220645 is 5460223611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1163220645 - 2³ = 1163220637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38774007 + ... + 38774036.

It is an arithmetic number, because the mean of its divisors is an integer number (232644132).

Almost surely, 2^1163220645 is an apocalyptic number.

1163220645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1163220645 is a deficient number, since it is larger than the sum of its proper divisors (697932411).

1163220645 is an equidigital number, since it uses as much as digits as its factorization.

1163220645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77548051.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1163220645 is about 34106.0206561833. The cubic root of 1163220645 is about 1051.6890863766.

The spelling of 1163220645 in words is "one billion, one hundred sixty-three million, two hundred twenty thousand, six hundred forty-five".