16646541121 has 12 divisors (see below), whose sum is σ = 19435814400. Its totient is φ = 14215801320.

The previous prime is 16646541101. The next prime is 16646541143. The reversal of 16646541121 is 12114564661.

It is not a de Polignac number, because 16646541121 - 2¹¹ = 16646539073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16646541101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613521 + ... + 640078.

It is an arithmetic number, because the mean of its divisors is an integer number (1619651200).

Almost surely, 2^16646541121 is an apocalyptic number.

It is an amenable number.

16646541121 is a deficient number, since it is larger than the sum of its proper divisors (2789273279).

16646541121 is a wasteful number, since it uses less digits than its factorization.

16646541121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253884 (or 1253877 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The spelling of 16646541121 in words is "sixteen billion, six hundred forty-six million, five hundred forty-one thousand, one hundred twenty-one".