853855478547 has 16 divisors (see below), whose sum is σ = 1146972126720. Its totient is φ = 564997138272.

The previous prime is 853855478521. The next prime is 853855478629. The reversal of 853855478547 is 745874558358.

It is not a de Polignac number, because 853855478547 - 2⁸ = 853855478291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853855478647) 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, 783147 + ... + 1523492.

It is an arithmetic number, because the mean of its divisors is an integer number (71685757920).

Almost surely, 2^853855478547 is an apocalyptic number.

853855478547 is a deficient number, since it is larger than the sum of its proper divisors (293116648173).

853855478547 is a wasteful number, since it uses less digits than its factorization.

853855478547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307562.

The product of its digits is 752640000, while the sum is 69.

The spelling of 853855478547 in words is "eight hundred fifty-three billion, eight hundred fifty-five million, four hundred seventy-eight thousand, five hundred forty-seven".