16721226265 has 16 divisors (see below), whose sum is σ = 21249265680. Its totient is φ = 12588042240.

The previous prime is 16721226257. The next prime is 16721226271. The reversal of 16721226265 is 56262212761.

16721226265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3103269849 + 13617956416 = 55707^2 + 116696^2 .

It is not a de Polignac number, because 16721226265 - 2³ = 16721226257 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 686821 + ... + 710749.

It is an arithmetic number, because the mean of its divisors is an integer number (1328079105).

Almost surely, 2^16721226265 is an apocalyptic number.

It is an amenable number.

16721226265 is a deficient number, since it is larger than the sum of its proper divisors (4528039415).

16721226265 is a wasteful number, since it uses less digits than its factorization.

16721226265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32172.

The product of its digits is 120960, while the sum is 40.

The spelling of 16721226265 in words is "sixteen billion, seven hundred twenty-one million, two hundred twenty-six thousand, two hundred sixty-five".