806505331946 has 4 divisors (see below), whose sum is σ = 1209757997922. Its totient is φ = 403252665972.

The previous prime is 806505331943. The next prime is 806505331997. The reversal of 806505331946 is 649133505608.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 799523893921 + 6981438025 = 894161^2 + 83555^2 .

It is a junction number, because it is equal to n+sod(n) for n = 806505331894 and 806505331903.

It is not an unprimeable number, because it can be changed into a prime (806505331943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201626332985 + ... + 201626332988.

Almost surely, 2^806505331946 is an apocalyptic number.

806505331946 is a deficient number, since it is larger than the sum of its proper divisors (403252665976).

806505331946 is a wasteful number, since it uses less digits than its factorization.

806505331946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403252665975.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 806505331946 in words is "eight hundred six billion, five hundred five million, three hundred thirty-one thousand, nine hundred forty-six".