856653151 has 4 divisors (see below), whose sum is σ = 872816472. Its totient is φ = 840489832.

The previous prime is 856653131. The next prime is 856653157. The reversal of 856653151 is 151356658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 856653151 - 2⁷ = 856653023 is a prime.

It is a super-2 number, since 2×856653151² = 1467709242236457602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856653157) 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, 8081581 + ... + 8081686.

It is an arithmetic number, because the mean of its divisors is an integer number (218204118).

Almost surely, 2^856653151 is an apocalyptic number.

856653151 is a deficient number, since it is larger than the sum of its proper divisors (16163321).

856653151 is a wasteful number, since it uses less digits than its factorization.

856653151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16163320.

The product of its digits is 108000, while the sum is 40.

The square root of 856653151 is about 29268.6376690136. The cubic root of 856653151 is about 949.7333142468.

The spelling of 856653151 in words is "eight hundred fifty-six million, six hundred fifty-three thousand, one hundred fifty-one".