3165695820 has 144 divisors (see below), whose sum is σ = 11328565248. Its totient is φ = 700237440.

The previous prime is 3165695807. The next prime is 3165695831. The reversal of 3165695820 is 285965613.

3165695820 is a `hidden beast` number, since 3 + 1 + 6 + 5 + 69 + 582 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1464 + ... + 79583.

It is an arithmetic number, because the mean of its divisors is an integer number (78670592).

Almost surely, 2^3165695820 is an apocalyptic number.

3165695820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3165695820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5664282624).

3165695820 is an abundant number, since it is smaller than the sum of its proper divisors (8162869428).

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

3165695820 is a wasteful number, since it uses less digits than its factorization.

3165695820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81100 (or 81095 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 3165695820 is about 56264.5165268484. The cubic root of 3165695820 is about 1468.3279336033.

The spelling of 3165695820 in words is "three billion, one hundred sixty-five million, six hundred ninety-five thousand, eight hundred twenty".