16645515354 has 96 divisors (see below), whose sum is σ = 41645560320. Its totient is φ = 4759312896.

The previous prime is 16645515353. The next prime is 16645515377. The reversal of 16645515354 is 45351554661.

16645515354 is a `hidden beast` number, since 1 + 6 + 64 + 5 + 51 + 535 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (16645515353) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287779 + ... + 340745.

It is an arithmetic number, because the mean of its divisors is an integer number (433807920).

Almost surely, 2^16645515354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16645515354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20822780160).

16645515354 is an abundant number, since it is smaller than the sum of its proper divisors (25000044966).

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

16645515354 is a wasteful number, since it uses less digits than its factorization.

16645515354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53084 (or 53081 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 16645515354 in words is "sixteen billion, six hundred forty-five million, five hundred fifteen thousand, three hundred fifty-four".