1115616645 has 96 divisors (see below), whose sum is σ = 2356308864. Its totient is φ = 499219200.

The previous prime is 1115616589. The next prime is 1115616659. The reversal of 1115616645 is 5466165111.

1115616645 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 6 + 1 + 6 + 645 = 666.

It is not a de Polignac number, because 1115616645 - 2²⁰ = 1114568069 is a prime.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 170535 + ... + 176955.

It is an arithmetic number, because the mean of its divisors is an integer number (24544884).

Almost surely, 2^1115616645 is an apocalyptic number.

1115616645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1115616645 is an abundant number, since it is smaller than the sum of its proper divisors (1240692219).

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

1115616645 is a wasteful number, since it uses less digits than its factorization.

1115616645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6465 (or 6453 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1115616645 is about 33400.8479682777. The cubic root of 1115616645 is about 1037.1422547490.

The spelling of 1115616645 in words is "one billion, one hundred fifteen million, six hundred sixteen thousand, six hundred forty-five".