16761856354121 has 16 divisors (see below), whose sum is σ = 17002068480000. Its totient is φ = 16523751796800.

The previous prime is 16761856354109. The next prime is 16761856354127. The reversal of 16761856354121 is 12145365816761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16761856354121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16761856354127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11582555 + ... + 12949103.

It is an arithmetic number, because the mean of its divisors is an integer number (1062629280000).

Almost surely, 2^{16761856354121} is an apocalyptic number.

It is an amenable number.

16761856354121 is a deficient number, since it is larger than the sum of its proper divisors (240212125879).

16761856354121 is a wasteful number, since it uses less digits than its factorization.

16761856354121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367320.

The product of its digits is 7257600, while the sum is 56.

The spelling of 16761856354121 in words is "sixteen trillion, seven hundred sixty-one billion, eight hundred fifty-six million, three hundred fifty-four thousand, one hundred twenty-one".