16561167663332 has 24 divisors (see below), whose sum is σ = 29893090192056. Its totient is φ = 8022205778688.

The previous prime is 16561167663283. The next prime is 16561167663367. The reversal of 16561167663332 is 23336676116561.

It can be written as a sum of positive squares in 4 ways, for example, as 297498248356 + 16263669414976 = 545434^2 + 4032824^2 .

It is an unprimeable number.

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, 240093803 + ... + 240162770.

It is an arithmetic number, because the mean of its divisors is an integer number (1245545424669).

Almost surely, 2^{16561167663332} is an apocalyptic number.

It is an amenable number.

16561167663332 is a deficient number, since it is larger than the sum of its proper divisors (13331922528724).

16561167663332 is a wasteful number, since it uses less digits than its factorization.

16561167663332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480256847 (or 480256845 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 56.

The spelling of 16561167663332 in words is "sixteen trillion, five hundred sixty-one billion, one hundred sixty-seven million, six hundred sixty-three thousand, three hundred thirty-two".