16653645000 has 120 divisors (see below), whose sum is σ = 56361638190. Its totient is φ = 4440960000.

The previous prime is 16653644977. The next prime is 16653645059. The reversal of 16653645000 is 54635661.

16653645000 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 3 + 645 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 153214884 + 16500430116 = 12378^2 + 128454^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-3 number, since 3×16653645000³ (a number of 32 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 140041 + ... + 230040.

Almost surely, 2^16653645000 is an apocalyptic number.

16653645000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16653645000 is an abundant number, since it is smaller than the sum of its proper divisors (39707993190).

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

16653645000 is a wasteful number, since it uses less digits than its factorization.

16653645000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370113 (or 370091 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 16653645000 in words is "sixteen billion, six hundred fifty-three million, six hundred forty-five thousand".