16721770051 has 8 divisors (see below), whose sum is σ = 19111381344. Its totient is φ = 14332355520.

The previous prime is 16721770007. The next prime is 16721770099. The reversal of 16721770051 is 15007712761.

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

It is not a de Polignac number, because 16721770051 - 2¹¹ = 16721768003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16721770001) 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 7 ways as a sum of consecutive naturals, for example, 278271 + ... + 332983.

It is an arithmetic number, because the mean of its divisors is an integer number (2388922668).

Almost surely, 2^16721770051 is an apocalyptic number.

16721770051 is a deficient number, since it is larger than the sum of its proper divisors (2389611293).

16721770051 is an equidigital number, since it uses as much as digits as its factorization.

16721770051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98381.

The product of its (nonzero) digits is 20580, while the sum is 37.

The spelling of 16721770051 in words is "sixteen billion, seven hundred twenty-one million, seven hundred seventy thousand, fifty-one".