812291382513 has 432 divisors, whose sum is σ = 1531923434496. Its totient is φ = 426513288960.

The previous prime is 812291382503. The next prime is 812291382547. The reversal of 812291382513 is 315283192218.

812291382513 is a `hidden beast` number, since 8 + 12 + 2 + 91 + 38 + 2 + 513 = 666.

It is not a de Polignac number, because 812291382513 - 2¹² = 812291378417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812291382503) by changing a digit.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 21953821131 + ... + 21953821167.

Almost surely, 2^812291382513 is an apocalyptic number.

It is an amenable number.

812291382513 is a deficient number, since it is larger than the sum of its proper divisors (719632051983).

812291382513 is a wasteful number, since it uses less digits than its factorization.

812291382513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 126 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 812291382513 in words is "eight hundred twelve billion, two hundred ninety-one million, three hundred eighty-two thousand, five hundred thirteen".