16501556650 has 24 divisors (see below), whose sum is σ = 31345940160. Its totient is φ = 6460182960.

The previous prime is 16501556627. The next prime is 16501556657. The reversal of 16501556650 is 5665510561.

It is not an unprimeable number, because it can be changed into a prime (16501556657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3508620 + ... + 3513319.

It is an arithmetic number, because the mean of its divisors is an integer number (1306080840).

Almost surely, 2^16501556650 is an apocalyptic number.

16501556650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16501556650 is a deficient number, since it is larger than the sum of its proper divisors (14844383510).

16501556650 is a wasteful number, since it uses less digits than its factorization.

16501556650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021998 (or 7021993 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 16501556650 in words is "sixteen billion, five hundred one million, five hundred fifty-six thousand, six hundred fifty".