16721155375 has 16 divisors (see below), whose sum is σ = 22095534240. Its totient is φ = 12590044800.

The previous prime is 16721155369. The next prime is 16721155463. The reversal of 16721155375 is 57355112761.

It is not a de Polignac number, because 16721155375 - 2⁵ = 16721155343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3932265 + ... + 3936514.

It is an arithmetic number, because the mean of its divisors is an integer number (1380970890).

Almost surely, 2^16721155375 is an apocalyptic number.

16721155375 is a deficient number, since it is larger than the sum of its proper divisors (5374378865).

16721155375 is an equidigital number, since it uses as much as digits as its factorization.

16721155375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7868811 (or 7868801 counting only the distinct ones).

The product of its digits is 220500, while the sum is 43.

The spelling of 16721155375 in words is "sixteen billion, seven hundred twenty-one million, one hundred fifty-five thousand, three hundred seventy-five".