16721550345 has 8 divisors (see below), whose sum is σ = 26754480576. Its totient is φ = 8918160176.

The previous prime is 16721550337. The next prime is 16721550359. The reversal of 16721550345 is 54305512761.

16721550345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16721550345 - 2³ = 16721550337 is a prime.

It is a super-2 number, since 2×16721550345² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557384997 + ... + 557385026.

It is an arithmetic number, because the mean of its divisors is an integer number (3344310072).

Almost surely, 2^16721550345 is an apocalyptic number.

16721550345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16721550345 is a deficient number, since it is larger than the sum of its proper divisors (10032930231).

16721550345 is a wasteful number, since it uses less digits than its factorization.

16721550345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114770031.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 16721550345 in words is "sixteen billion, seven hundred twenty-one million, five hundred fifty thousand, three hundred forty-five".