856109763 has 16 divisors (see below), whose sum is σ = 1285687840. Its totient is φ = 562920192.

The previous prime is 856109713. The next prime is 856109789. The reversal of 856109763 is 367901658.

It is a happy number.

It is not a de Polignac number, because 856109763 - 2¹⁴ = 856093379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856109713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215206 + ... + 219147.

It is an arithmetic number, because the mean of its divisors is an integer number (80355490).

Almost surely, 2^856109763 is an apocalyptic number.

856109763 is a deficient number, since it is larger than the sum of its proper divisors (429578077).

856109763 is a wasteful number, since it uses less digits than its factorization.

856109763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434435 (or 434429 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 856109763 is about 29259.3534275794. The cubic root of 856109763 is about 949.5324617229.

The spelling of 856109763 in words is "eight hundred fifty-six million, one hundred nine thousand, seven hundred sixty-three".