856696155 has 48 divisors (see below), whose sum is σ = 1599575040. Its totient is φ = 390387648.

The previous prime is 856696151. The next prime is 856696177. The reversal of 856696155 is 551696658.

It is a happy number.

It is not a de Polignac number, because 856696155 - 2² = 856696151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856696098 and 856696107.

It is not an unprimeable number, because it can be changed into a prime (856696151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253366 + ... + 256724.

It is an arithmetic number, because the mean of its divisors is an integer number (33324480).

Almost surely, 2^856696155 is an apocalyptic number.

856696155 is a deficient number, since it is larger than the sum of its proper divisors (742878885).

856696155 is a wasteful number, since it uses less digits than its factorization.

856696155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728 (or 3721 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 51.

The square root of 856696155 is about 29269.3723028014. The cubic root of 856696155 is about 949.7492061894.

The spelling of 856696155 in words is "eight hundred fifty-six million, six hundred ninety-six thousand, one hundred fifty-five".