853949720835 has 48 divisors (see below), whose sum is σ = 1487089581120. Its totient is φ = 453318647040.

The previous prime is 853949720821. The next prime is 853949720839. The reversal of 853949720835 is 538027949358.

853949720835 is a `hidden beast` number, since 8 + 5 + 394 + 9 + 7 + 208 + 35 = 666.

853949720835 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 924094²-1.

It is not a de Polignac number, because 853949720835 - 2⁷ = 853949720707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853949720839) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8265517 + ... + 8368193.

It is an arithmetic number, because the mean of its divisors is an integer number (30981032940).

Almost surely, 2^853949720835 is an apocalyptic number.

853949720835 is a deficient number, since it is larger than the sum of its proper divisors (633139860285).

853949720835 is a wasteful number, since it uses less digits than its factorization.

853949720835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103548 (or 103545 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 853949720835 in words is "eight hundred fifty-three billion, nine hundred forty-nine million, seven hundred twenty thousand, eight hundred thirty-five".