855753985 has 8 divisors (see below), whose sum is σ = 1071552960. Its totient is φ = 654837744.

The previous prime is 855753971. The next prime is 855753989. The reversal of 855753985 is 589357558.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855753985 - 2²⁹ = 318883073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855753989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3720555 + ... + 3720784.

It is an arithmetic number, because the mean of its divisors is an integer number (133944120).

Almost surely, 2^855753985 is an apocalyptic number.

It is an amenable number.

855753985 is a deficient number, since it is larger than the sum of its proper divisors (215798975).

855753985 is a wasteful number, since it uses less digits than its factorization.

855753985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7441367.

The product of its digits is 7560000, while the sum is 55.

The square root of 855753985 is about 29253.2730647359. The cubic root of 855753985 is about 949.4009094452.

The spelling of 855753985 in words is "eight hundred fifty-five million, seven hundred fifty-three thousand, nine hundred eighty-five".