806161644 has 36 divisors (see below), whose sum is σ = 2060702280. Its totient is φ = 265700160.

The previous prime is 806161613. The next prime is 806161649. The reversal of 806161644 is 446161608.

806161644 is a `hidden beast` number, since 8 + 0 + 6 + 1 + 6 + 1 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 806161599 and 806161608.

It is not an unprimeable number, because it can be changed into a prime (806161649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122602 + ... + 129009.

It is an arithmetic number, because the mean of its divisors is an integer number (57241730).

Almost surely, 2^806161644 is an apocalyptic number.

It is an amenable number.

806161644 is an abundant number, since it is smaller than the sum of its proper divisors (1254540636).

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

806161644 is a wasteful number, since it uses less digits than its factorization.

806161644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251710 (or 251705 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 806161644 is about 28392.9858239672. The cubic root of 806161644 is about 930.6949921205.

Subtracting from 806161644 its sum of digits (36), we obtain a palindrome (806161608).

The spelling of 806161644 in words is "eight hundred six million, one hundred sixty-one thousand, six hundred forty-four".