812095257247 has 8 divisors (see below), whose sum is σ = 818382723840. Its totient is φ = 805809128280.

The previous prime is 812095257227. The next prime is 812095257263. The reversal of 812095257247 is 742752590218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812095257247 - 2⁷ = 812095257119 is a prime.

It is a super-2 number, since 2×812095257247² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812095257194 and 812095257203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812095257227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902154 + ... + 1561432.

It is an arithmetic number, because the mean of its divisors is an integer number (102297840480).

Almost surely, 2^812095257247 is an apocalyptic number.

812095257247 is a deficient number, since it is larger than the sum of its proper divisors (6287466593).

812095257247 is a wasteful number, since it uses less digits than its factorization.

812095257247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668813.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 812095257247 in words is "eight hundred twelve billion, ninety-five million, two hundred fifty-seven thousand, two hundred forty-seven".