1099163520 has 640 divisors, whose sum is σ = 4851887040. Its totient is φ = 230916096.

The previous prime is 1099163519. The next prime is 1099163531. The reversal of 1099163520 is 253619901.

1099163520 is a `hidden beast` number, since 10 + 9 + 9 + 1 + 635 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 1398 × 630 × 1248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4717324 + ... + 4717556.

Almost surely, 2^1099163520 is an apocalyptic number.

1099163520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099163520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2425943520).

1099163520 is an abundant number, since it is smaller than the sum of its proper divisors (3752723520).

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

1099163520 is a wasteful number, since it uses less digits than its factorization.

1099163520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1099163520 is about 33153.6350948128. The cubic root of 1099163520 is about 1032.0183879904.

The spelling of 1099163520 in words is "one billion, ninety-nine million, one hundred sixty-three thousand, five hundred twenty".