856745153 has 4 divisors (see below), whose sum is σ = 934631088. Its totient is φ = 778859220.

The previous prime is 856745137. The next prime is 856745161. The reversal of 856745153 is 351547658.

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 a cyclic number.

It is not a de Polignac number, because 856745153 - 2⁴ = 856745137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856745353) 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, 38942951 + ... + 38942972.

It is an arithmetic number, because the mean of its divisors is an integer number (233657772).

Almost surely, 2^856745153 is an apocalyptic number.

It is an amenable number.

856745153 is a deficient number, since it is larger than the sum of its proper divisors (77885935).

856745153 is a wasteful number, since it uses less digits than its factorization.

856745153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77885934.

The product of its digits is 504000, while the sum is 44.

The square root of 856745153 is about 29270.2093091252. The cubic root of 856745153 is about 949.7673125406.

The spelling of 856745153 in words is "eight hundred fifty-six million, seven hundred forty-five thousand, one hundred fifty-three".