1099412865 has 96 divisors (see below), whose sum is σ = 2185781760. Its totient is φ = 522422784.

The previous prime is 1099412803. The next prime is 1099412879. The reversal of 1099412865 is 5682149901.

It is not a de Polignac number, because 1099412865 - 2¹³ = 1099404673 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1099412865.

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 95 ways as a sum of consecutive naturals, for example, 827832 + ... + 829158.

It is an arithmetic number, because the mean of its divisors is an integer number (22768560).

Almost surely, 2^1099412865 is an apocalyptic number.

1099412865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1099412865 is a deficient number, since it is larger than the sum of its proper divisors (1086368895).

1099412865 is a wasteful number, since it uses less digits than its factorization.

1099412865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1099412865 is about 33157.3953289458. The cubic root of 1099412865 is about 1032.0964198041.

The spelling of 1099412865 in words is "one billion, ninety-nine million, four hundred twelve thousand, eight hundred sixty-five".