21409161126 has 64 divisors (see below), whose sum is σ = 45618059520. Its totient is φ = 6679221120.

The previous prime is 21409161077. The next prime is 21409161133. The reversal of 21409161126 is 62116190412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4840396 + ... + 4844816.

It is an arithmetic number, because the mean of its divisors is an integer number (712782180).

Almost surely, 2^21409161126 is an apocalyptic number.

21409161126 is an abundant number, since it is smaller than the sum of its proper divisors (24208898394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21409161126 is a wasteful number, since it uses less digits than its factorization.

21409161126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 21409161126 in words is "twenty-one billion, four hundred nine million, one hundred sixty-one thousand, one hundred twenty-six".