812542222472 has 36 divisors (see below), whose sum is σ = 1529164095615. Its totient is φ = 404770685760.

The previous prime is 812542222469. The next prime is 812542222511. The reversal of 812542222472 is 274222245218.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 28336335556 + 784205886916 = 168334^2 + 885554^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=637394.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1073371118 + ... + 1073371874.

Almost surely, 2^812542222472 is an apocalyptic number.

It is an amenable number.

812542222472 is a deficient number, since it is larger than the sum of its proper divisors (716621873143).

812542222472 is an frugal number, since it uses more digits than its factorization.

812542222472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 1180 counting only the distinct ones).

The product of its digits is 286720, while the sum is 41.

The spelling of 812542222472 in words is "eight hundred twelve billion, five hundred forty-two million, two hundred twenty-two thousand, four hundred seventy-two".