812633737444 has 27 divisors (see below), whose sum is σ = 1486704029097. Its totient is φ = 388631085744.

The previous prime is 812633737403. The next prime is 812633737483. The reversal of 812633737444 is 444737336218.

The square root of 812633737444 is 901462.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 312626356900 + 500007380544 = 559130^2 + 707112^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812633737391 and 812633737400.

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, 41457454 + ... + 41477050.

Almost surely, 2^812633737444 is an apocalyptic number.

812633737444 is the 901462-nd square number.

It is an amenable number.

812633737444 is a deficient number, since it is larger than the sum of its proper divisors (674070291653).

812633737444 is an frugal number, since it uses more digits than its factorization.

812633737444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39244 (or 19622 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 52.

The spelling of 812633737444 in words is "eight hundred twelve billion, six hundred thirty-three million, seven hundred thirty-seven thousand, four hundred forty-four".