6853645511 has 4 divisors (see below), whose sum is σ = 6858123624. Its totient is φ = 6849167400.

The previous prime is 6853645481. The next prime is 6853645537. The reversal of 6853645511 is 1155463586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6853645511 - 2¹⁴ = 6853629127 is a prime.

It is a super-2 number, since 2×6853645511² = 93944913580900902242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6853645411) 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, 2236760 + ... + 2239821.

It is an arithmetic number, because the mean of its divisors is an integer number (1714530906).

Almost surely, 2^6853645511 is an apocalyptic number.

6853645511 is a deficient number, since it is larger than the sum of its proper divisors (4478113).

6853645511 is a wasteful number, since it uses less digits than its factorization.

6853645511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478112.

The product of its digits is 432000, while the sum is 44.

The square root of 6853645511 is about 82786.7471942219. The cubic root of 6853645511 is about 1899.5054586395.

The spelling of 6853645511 in words is "six billion, eight hundred fifty-three million, six hundred forty-five thousand, five hundred eleven".