853930861617 has 4 divisors (see below), whose sum is σ = 1138574482160. Its totient is φ = 569287241076.

The previous prime is 853930861603. The next prime is 853930861643. The reversal of 853930861617 is 716168039358.

853930861617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 853930861617 - 2³² = 849635894321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853930860617) 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, 142321810267 + ... + 142321810272.

It is an arithmetic number, because the mean of its divisors is an integer number (284643620540).

Almost surely, 2^853930861617 is an apocalyptic number.

It is an amenable number.

853930861617 is a deficient number, since it is larger than the sum of its proper divisors (284643620543).

853930861617 is a wasteful number, since it uses less digits than its factorization.

853930861617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284643620542.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 853930861617 in words is "eight hundred fifty-three billion, nine hundred thirty million, eight hundred sixty-one thousand, six hundred seventeen".