16353001561 has 4 divisors (see below), whose sum is σ = 17610924772. Its totient is φ = 15095078352.

The previous prime is 16353001559. The next prime is 16353001571. The reversal of 16353001561 is 16510035361.

16353001561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5004147600 + 11348853961 = 70740^2 + 106531^2 .

It is a cyclic number.

It is not a de Polignac number, because 16353001561 - 2¹ = 16353001559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16353001531) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 628961586 + ... + 628961611.

It is an arithmetic number, because the mean of its divisors is an integer number (4402731193).

Almost surely, 2^16353001561 is an apocalyptic number.

It is an amenable number.

16353001561 is a deficient number, since it is larger than the sum of its proper divisors (1257923211).

16353001561 is a wasteful number, since it uses less digits than its factorization.

16353001561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257923210.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 16353001561 in words is "sixteen billion, three hundred fifty-three million, one thousand, five hundred sixty-one".