853311645 has 16 divisors (see below), whose sum is σ = 1516998720. Its totient is φ = 455099472.

The previous prime is 853311643. The next prime is 853311647. The reversal of 853311645 is 546113358.

853311645 is a `hidden beast` number, since 8 + 5 + 3 + 3 + 1 + 1 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (853311643) and next prime (853311647).

It is not a de Polignac number, because 853311645 - 2¹ = 853311643 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853311643) 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, 3160279 + ... + 3160548.

It is an arithmetic number, because the mean of its divisors is an integer number (94812420).

Almost surely, 2^853311645 is an apocalyptic number.

It is an amenable number.

853311645 is a deficient number, since it is larger than the sum of its proper divisors (663687075).

853311645 is a wasteful number, since it uses less digits than its factorization.

853311645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6320841 (or 6320835 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 853311645 is about 29211.4985065813. The cubic root of 853311645 is about 948.4968453910.

The spelling of 853311645 in words is "eight hundred fifty-three million, three hundred eleven thousand, six hundred forty-five".