16645903608 has 64 divisors (see below), whose sum is σ = 42240448800. Its totient is φ = 5465802240.

The previous prime is 16645903607. The next prime is 16645903649. The reversal of 16645903608 is 80630954661.

It is a super-2 number, since 2×16645903608² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645903607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434178 + ... + 470958.

Almost surely, 2^16645903608 is an apocalyptic number.

It is an amenable number.

16645903608 is an abundant number, since it is smaller than the sum of its proper divisors (25594545192).

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

16645903608 is a wasteful number, since it uses less digits than its factorization.

16645903608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37072 (or 37068 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 16645903608 in words is "sixteen billion, six hundred forty-five million, nine hundred three thousand, six hundred eight".