812654725517 has 4 divisors (see below), whose sum is σ = 855426026880. Its totient is φ = 769883424156.

The previous prime is 812654725511. The next prime is 812654725529. The reversal of 812654725517 is 715527456218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 812654725517 - 2²⁸ = 812386290061 is a prime.

It is a super-2 number, since 2×812654725517² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812654725511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21385650653 + ... + 21385650690.

It is an arithmetic number, because the mean of its divisors is an integer number (213856506720).

Almost surely, 2^812654725517 is an apocalyptic number.

It is an amenable number.

812654725517 is a deficient number, since it is larger than the sum of its proper divisors (42771301363).

812654725517 is a wasteful number, since it uses less digits than its factorization.

812654725517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42771301362.

The product of its digits is 4704000, while the sum is 53.

The spelling of 812654725517 in words is "eight hundred twelve billion, six hundred fifty-four million, seven hundred twenty-five thousand, five hundred seventeen".