813550012 has 12 divisors (see below), whose sum is σ = 1553141016. Its totient is φ = 369795440.

The previous prime is 813549911. The next prime is 813550027. The reversal of 813550012 is 210055318.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9244843 + ... + 9244930.

It is an arithmetic number, because the mean of its divisors is an integer number (129428418).

Almost surely, 2^813550012 is an apocalyptic number.

It is an amenable number.

813550012 is a deficient number, since it is larger than the sum of its proper divisors (739591004).

813550012 is a wasteful number, since it uses less digits than its factorization.

813550012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18489788 (or 18489786 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 813550012 is about 28522.7981095824. The cubic root of 813550012 is about 933.5295835052.

The spelling of 813550012 in words is "eight hundred thirteen million, five hundred fifty thousand, twelve".