21161323151626 has 16 divisors (see below), whose sum is σ = 36713620891584. Its totient is φ = 8959871764224.

The previous prime is 21161323151611. The next prime is 21161323151627. The reversal of 21161323151626 is 62615132316112.

It is not an unprimeable number, because it can be changed into a prime (21161323151627) 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 7 ways as a sum of consecutive naturals, for example, 9105559575 + ... + 9105561898.

It is an arithmetic number, because the mean of its divisors is an integer number (2294601305724).

Almost surely, 2^{21161323151626} is an apocalyptic number.

21161323151626 is a deficient number, since it is larger than the sum of its proper divisors (15552297739958).

21161323151626 is a wasteful number, since it uses less digits than its factorization.

21161323151626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18211121565.

The product of its digits is 77760, while the sum is 40.

Adding to 21161323151626 its reverse (62615132316112), we get a palindrome (83776455467738).

The spelling of 21161323151626 in words is "twenty-one trillion, one hundred sixty-one billion, three hundred twenty-three million, one hundred fifty-one thousand, six hundred twenty-six".