16853553261 has 48 divisors (see below), whose sum is σ = 26678995200. Its totient is φ = 10211370624.

The previous prime is 16853553239. The next prime is 16853553287. The reversal of 16853553261 is 16235535861.

16853553261 is a `hidden beast` number, since 1 + 6 + 8 + 53 + 5 + 532 + 61 = 666.

It is not a de Polignac number, because 16853553261 - 2⁵ = 16853553229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16853553061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 767740 + ... + 789386.

It is an arithmetic number, because the mean of its divisors is an integer number (555812400).

Almost surely, 2^16853553261 is an apocalyptic number.

It is an amenable number.

16853553261 is a deficient number, since it is larger than the sum of its proper divisors (9825441939).

16853553261 is a wasteful number, since it uses less digits than its factorization.

16853553261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21858 (or 21855 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 16853553261 in words is "sixteen billion, eight hundred fifty-three million, five hundred fifty-three thousand, two hundred sixty-one".