16853922537661 has 4 divisors (see below), whose sum is σ = 18386097313824. Its totient is φ = 15321747761500.

The previous prime is 16853922537637. The next prime is 16853922537671. The reversal of 16853922537661 is 16673522935861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16853922537661 - 2¹⁷ = 16853922406589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16853922537593 and 16853922537602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16853922537601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766087388065 + ... + 766087388086.

It is an arithmetic number, because the mean of its divisors is an integer number (4596524328456).

Almost surely, 2^{16853922537661} is an apocalyptic number.

16853922537661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16853922537661 is a deficient number, since it is larger than the sum of its proper divisors (1532174776163).

16853922537661 is a wasteful number, since it uses less digits than its factorization.

16853922537661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532174776162.

The product of its digits is 97977600, while the sum is 64.

The spelling of 16853922537661 in words is "sixteen trillion, eight hundred fifty-three billion, nine hundred twenty-two million, five hundred thirty-seven thousand, six hundred sixty-one".