812555542612 has 48 divisors (see below), whose sum is σ = 1574158686912. Its totient is φ = 363897895680.

The previous prime is 812555542529. The next prime is 812555542613. The reversal of 812555542612 is 216245555218.

It is a happy number.

It is a super-4 number, since 4×812555542612⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812555542613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2908198 + ... + 3175330.

It is an arithmetic number, because the mean of its divisors is an integer number (32794972644).

Almost surely, 2^812555542612 is an apocalyptic number.

It is an amenable number.

812555542612 is a deficient number, since it is larger than the sum of its proper divisors (761603144300).

812555542612 is a wasteful number, since it uses less digits than its factorization.

812555542612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268168 (or 268166 counting only the distinct ones).

The product of its digits is 960000, while the sum is 46.

The spelling of 812555542612 in words is "eight hundred twelve billion, five hundred fifty-five million, five hundred forty-two thousand, six hundred twelve".