853863232477 has 4 divisors (see below), whose sum is σ = 853899422940. Its totient is φ = 853827042016.

The previous prime is 853863232447. The next prime is 853863232499. The reversal of 853863232477 is 774232368358.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138340107481 + 715523124996 = 371941^2 + 845886^2 .

It is a cyclic number.

It is not a de Polignac number, because 853863232477 - 2¹⁹ = 853862708189 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853863232427) 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, 18059818 + ... + 18107035.

It is an arithmetic number, because the mean of its divisors is an integer number (213474855735).

Almost surely, 2^853863232477 is an apocalyptic number.

It is an amenable number.

853863232477 is a deficient number, since it is larger than the sum of its proper divisors (36190463).

853863232477 is a wasteful number, since it uses less digits than its factorization.

853863232477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36190462.

The product of its digits is 40642560, while the sum is 58.

The spelling of 853863232477 in words is "eight hundred fifty-three billion, eight hundred sixty-three million, two hundred thirty-two thousand, four hundred seventy-seven".