856505610 has 32 divisors (see below), whose sum is σ = 2284015680. Its totient is φ = 228401424.

The previous prime is 856505549. The next prime is 856505659. The reversal of 856505610 is 16505658.

It is a super-2 number, since 2×856505610² = 1467203719922944200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1585852 + ... + 1586391.

It is an arithmetic number, because the mean of its divisors is an integer number (71375490).

Almost surely, 2^856505610 is an apocalyptic number.

856505610 is an abundant number, since it is smaller than the sum of its proper divisors (1427510070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856505610 is a wasteful number, since it uses less digits than its factorization.

856505610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172259 (or 3172253 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 856505610 is about 29266.1170981051. The cubic root of 856505610 is about 949.6787870643.

The spelling of 856505610 in words is "eight hundred fifty-six million, five hundred five thousand, six hundred ten".